If I was doing it, the first thing I would do is look into CLEP (College Level Examination Program) tests. About $30 a Credit hour I believe. You can knock out 2 years of school with it. To be fair, some are not easy.
Like someone else mentioned look at community colleges. Different states have different nomenclature. But generally public College is the first step, then University to finish.
If you are thinking IT, I would recommend Western Governors. It is online, you pay per 6 months, and you can take as much as you can handle. In theory you could graduate in 6 months, but I doubt that is practical.