I'm going to a community college now (at 34) and it seems like the quality of teaching is very good but the grading is too generous. If I had lower ambitions, I could see myself getting by on an hour a week of study for each class while still earning good grades.

I am worried about the opportunity cost, in terms of networking with people, but I had no choice but to start in a community college due to poor high school grades. After 30 hours I can transfer, but I will probably stay since I can maintain my full time software developer job while in the community college. I don't think I'll be able to do that when I transfer to the university.