It depends on what you want out of life.
Pretty much, an average non-science or math based 4 year degree will get you a job that pays 30,000-40,000 per year (not counting large cities and inflated areas.).You can get that without a degree.
Alot of guys with 2 year computer IS type degress can get 40,000-50,000 easily. Now, if you go into science and math or almost anything and get a masters you will do well as long as you are even a decent worker. some more specialized 4 year degrees can get you started nicely if you are willing to move.
Life experience is priceless, as far as what Rob was talking about, and is very important.
If you want to make lots of cash there are many ways to do it. It depends on how driven you are and if you have the physical and mental abilities. If you want alot of money through college then you may want to debate on a common 4 year degree..
It may be more worth it to just work....really look at what college students are making in the field of your degree..and don't trust the college..get your own independent stats. It's a whole lotta cash to be throwing around without knowing what the end result will be or is supposed to gain you...