The silicon valley is insanely expensive; other places in California have more reasonable costs of living. In my hometown (Sacramento), $40k/year can buy you a modest house and a comfortable lifestyle. In San Jose (where I live now), you'd better be making at least double that (for a modest home).
I hear that. I'm making about double that and am barely keeping up with my rent in Campbell. Granted, I have a wife, kid, and a lot of debt to pay down.
I've been going to Hackers and Founders off and on for the last six months and always enjoyed myself. Jonathan does a great job of making it a welcoming and friendly environment. Bring your side project, or help give feedback to other people about their side project. It's a great way to get an outside perspective on technology (that is, apart from the people you normally work/socialize with).