One of my brothers learns full time and gets no support from my parents, his in-laws or the government. His wife has one of those college educations without stepping foot in college.
He told me that aside from his kollel paycheck he goes to a morning kollel that pays extra, found a place that will pay him if he passes bechinas on what he learns and goes to a night kollel that also pays extra. (He probably also tutors on the side for some more cash.)
I have sent him some money in the past when unexpected expenses came up but not on a regular basis.
Keep in mind that he was serious about his learning from when he was born and he is willing to do whatever it takes to make it work.