CA community colleges are heavily funded by the state. At my firm, we used to get our OSHA, Confined Space and Transportation certificate renewal for $5 per person at Cuyamaca College. It is up to around $60 per person now, but still a lot cheaper than doing the renewal through private companies.
My wife does all her real estate classes/continuing educations through the community college system also. They also offer classes like ballroom dancing, flower arrangement, etc. We took their dance, cooking, brewing and wine appreciation classes in the past for fun.
Most community colleges only offer associate degrees. I don't think the majority offer 4 year degrees. You should still be able to do all your general education and basic math/chemistry/physics/engineering classes at a community college, then transfer to a university for the last two years.