user-1: It's said that desire for gains as intention for one undertakings, beyond simply that for liberation from suffering, is a huge hindrance, obstacle.
No, the Buddha also warned even Arahats, at least in regard of the accumulation of sakkara (honor, amassing honor, Labāsakkara), as being a cause that leads to unease.
Now, what could, should one do, should avoid, that all kinds of such accumulations do not take place and do not endanger ones intention, aspiration, to bend from highest path and fruits, awakening?
Which role does maccharia (stinginess of five kinds and one primare cause) plays here, and if related, what kind of practice would work against such?
(Note that this task is not given for trade, exchange, stacks or entertainments but just to bind toward liberation)

user471: From SN 17.5 sutta itself and other SN 17 suttas, you can read:

"Thus you should train yourselves: 'We will put aside any gains,
  offerings, & fame that have arisen; and we will not let any gains,
  offerings, & fame that have arisen keep our minds consumed.' That's
  how you should train yourselves."

It is not the gains, offering and fame that is to be avoided, but rather the mental obsession with them, that is to be avoided (for future) and put aside (for past), as karma is all about intention.
I don't understand the second question.
This type of mental obsession is due to clinging (upādāna) to gains, offering and fame. It's greed (lobha / rāga).
If one monk is envious due to another's gains and fames, then he too suffers from clinging, and this time it's aversion (dosa / dveṣa).
In SN 35.153, the Buddha taught:

“Further, bhikkhus, having heard a sound with the ear … … Having
  cognized a mental phenomenon with the mind, if there is lust, hatred,
  or delusion internally, a bhikkhu understands: ‘There is lust, hatred,
  or delusion internally’; or, if there is no lust, hatred, or delusion
  internally, he understands: ‘There is no lust, hatred, or delusion
  internally.’ Since this is so, are these things to be understood by
  faith, or by personal preference, or by oral tradition, or by reasoned
  reflection, or by acceptance of a view after pondering it?”
“No, venerable sir.”
“Aren’t these things to be understood by seeing them with wisdom?”
“Yes, venerable sir.”
“This, bhikkhus, is the method of exposition by means of which a
  bhikkhu—apart from faith, apart from personal preference, apart from
  oral tradition, apart from reasoned reflection, apart from acceptance
  of a view after pondering it—can declare final knowledge thus:
  ‘Destroyed is birth, the holy life has been lived, what had to be done
  has been done, there is no more for this state of being.’”


user254: Now, what could, should one do, should avoid, that all kinds of such accumulations do not take place and do not endanger ones intention, aspiration, to bend from highest path and fruits, awakening?
That sutta implies that even accumulating dung can be a problem for some.
So I'm not sure it's feasible to solve that by avoiding literally everything (especially for a house-holder, but presumably mendicants too -- the sutta seems to be addressed to bhikkhus, not to arhats) -- even including, for example, "food" and "honours".
Instead the problem seems to be in the mental attitude toward accumulation, for example:

"With a mind overcome and overwhelmed by possessions, honor, and popularity"
"they look down on other good-hearted mendicants"

There are other suttas nearby on the same or similar theme -- for example, SN 17.3 offers,

Whoever enjoys and likes arisen possessions, honor, and popularity is called a mendicant who has been pierced with a harpoon

I suppose the problem originates from the delighting in such things.
Perhaps the sutta itself suggests one of the remedies -- if you see (view) it as being like dung, not nourishing, then you might not be inclined to accumulate (eat) it.
And, as you pointed out in a comment, SN 17.30 says,

We will give up arisen possessions, honor, and popularity, and we won’t let them occupy our minds.


-1: <p>It's said that desire for gains as intention for one undertakings, beyond simply that for liberation from suffering, is a huge hindrance, obstacle.</p>

<p>No, the Buddha also warned even Arahats, at least in regard of the accumulation of sakkara (honor, amassing honor, <a href="http://zugangzureinsicht.org/html/tipitaka/sn/sn17/sn17.005.than_en.html" rel="nofollow noreferrer">Labāsakkara</a>), as being a cause that leads to unease.</p>

<p>Now, what could, should one do, should avoid, that all kinds of such accumulations do not take place and do not endanger ones intention, aspiration, to bend from highest path and fruits, awakening?</p>

<p>Which role does maccharia (stinginess of five kinds and one primare cause) plays here, and if related, what kind of practice would work against such?</p>

<p><em>(Note that this task is not given for trade, exchange, stacks or entertainments but just to bind toward liberation)</em></p>
 471: <p>From <a href="https://www.accesstoinsight.org/tipitaka/sn/sn17/sn17.005.than.html" rel="nofollow noreferrer">SN 17.5</a> sutta itself and other SN 17 suttas, you can read:</p>

<blockquote>
  <p>"Thus you should train yourselves: 'We will put aside any gains,
  offerings, &amp; fame that have arisen; and we will not let any gains,
  offerings, &amp; fame that have arisen <strong>keep our minds consumed</strong>.' That's
  how you should train yourselves."</p>
</blockquote>

<p>It is not the gains, offering and fame that is to be avoided, but rather the mental obsession with them, that is to be avoided (for future) and put aside (for past), as karma is all about intention.</p>

<p>I don't understand the second question.</p>

<p>This type of mental obsession is due to clinging (<em>upādāna</em>) to gains, offering and fame. It's greed (<em>lobha / rāga</em>).</p>

<p>If one monk is envious due to another's gains and fames, then he too suffers from clinging, and this time it's aversion (<em>dosa / dveṣa</em>).</p>

<p>In <a href="https://suttacentral.net/sn35.153/en/bodhi" rel="nofollow noreferrer">SN 35.153</a>, the Buddha taught:</p>

<blockquote>
  <p>“Further, bhikkhus, having heard a sound with the ear … … Having
  cognized a mental phenomenon with the mind, if there is lust, hatred,
  or delusion internally, a bhikkhu understands: ‘There is lust, hatred,
  or delusion internally’; or, if there is no lust, hatred, or delusion
  internally, he understands: ‘There is no lust, hatred, or delusion
  internally.’ Since this is so, are these things to be understood by
  faith, or by personal preference, or by oral tradition, or by reasoned
  reflection, or by acceptance of a view after pondering it?”</p>
  
  <p>“No, venerable sir.”</p>
  
  <p>“Aren’t these things to be understood by seeing them with wisdom?”</p>
  
  <p>“Yes, venerable sir.”</p>
  
  <p>“This, bhikkhus, is the method of exposition by means of which a
  bhikkhu—apart from faith, apart from personal preference, apart from
  oral tradition, apart from reasoned reflection, apart from acceptance
  of a view after pondering it—can declare final knowledge thus:
  ‘Destroyed is birth, the holy life has been lived, what had to be done
  has been done, there is no more for this state of being.’”</p>
</blockquote>
 254: <p><strong>Now, what could, should one do, should avoid, that all kinds of such accumulations do not take place and do not endanger ones intention, aspiration, to bend from highest path and fruits, awakening?</strong></p>

<p>That sutta implies that even accumulating dung can be a problem for some.</p>

<p>So I'm not sure it's feasible to solve that by avoiding literally everything (especially for a house-holder, but presumably mendicants too -- the sutta seems to be addressed to bhikkhus, not to arhats) -- even including, for example, "food" and "honours".</p>

<p>Instead the problem seems to be in the mental attitude toward accumulation, for example:</p>

<ul>
<li>"With a mind overcome and overwhelmed by possessions, honor, and popularity"</li>
<li>"they look down on other good-hearted mendicants"</li>
</ul>

<p>There are other suttas nearby on the same or similar theme -- for example, <a href="https://suttacentral.net/sn17.3/en/sujato" rel="nofollow noreferrer">SN 17.3</a> offers,</p>

<blockquote>
  <p>Whoever enjoys and likes arisen possessions, honor, and popularity is called a mendicant who has been pierced with a harpoon</p>
</blockquote>

<p>I suppose the problem originates from the delighting in such things.</p>

<p>Perhaps the sutta itself suggests one of the remedies -- if you see (view) it as being like dung, not nourishing, then you might not be inclined to accumulate (eat) it.</p>

<p>And, as you pointed out in a comment, <a href="https://suttacentral.net/sn17.30/en/sujato" rel="nofollow noreferrer">SN 17.30</a> says,</p>

<blockquote>
  <p>We will give up arisen possessions, honor, and popularity, and we won’t let them occupy our minds.</p>
</blockquote>
