Should I choose a managed or unmanaged VPS?
xist: IMHO, if you need to ask, then managed is the way to go ;)In all seriousness, I would agree that your time might be better spent elsewhere.  There's only so many hours in a day and if you're using it to generate income, your time is better spent elsewhere than playing around with things.Security aspects are the most timeconsuming part of managing even a test server.  Installing software and configuring it is a walk in the park compared to doing the dance with all the script kiddiez out there.
Good Luck!