PhD by published work I have developed a logic and consistent body of research of 8 papers about a research topic. I've heard I can do a PhD by published work. It is just compiling the papers and writing the scope and importance of the papers  in 5000-10000 words, then the viva.

I know universities in the UK where I can do this, but they charge like 5000 GBP for the submission. 

Do you know other universities in other countries that charge less? I am thinking of norway, finland, germany, as they seem to have low tuition fees. However, I am willing to consider any country in Europe.
I am living in Portugal, so I would need to submit my thesis online, and travel to the university for the viva

Any help appreciated,
Thanks,
Proceed with extreme caution.
What you are describing is known as a stapler thesis or sandwich thesis. This is a common practice for submitting theses, if the advisor, department, and university permit it.
However, such theses are submitted by students who are already enrolled at a university. Virtually all reputable universities will require you to enroll as a student for a period of time before you are eligible to submit your theses, and you generally have to show that you have made contributions to your field during your period of enrollment. Taking a bunch of previously submitted papers and submitting them as a thesis at a school you have never attended, particularly for a large fee, reeks of a school being a diploma mill, a plain old scam, or just desperate for cash.
While the UK offers such programs, they are normally for their own alumni and employees, and it can be a very time-consuming and frustrating process. Moreover, such programs are not well regarded by many employers, and you will be at a disadvantage for many jobs if you have to compete with recipients of standard research PhD’s.