I live in L.A. and would add a few things. Of course Phil is right about not planning on bodybuilding as a job .. as Lats said, I've also seen literally hundreds of guys from the Midwest and elsewhere come out here and not be able to make a living, and then return to their hometowns. But there are some reasons why you might want to consider L.A. (can't speak to other West Coast cities).
If you have any interest in promoting yourself in magazines, etc., I think that you have a somewhat better chance if you live where many of the working bodybuilding photographers live, and where Weider is headquartered. If you want to try to leverage your physique into commercials and an occasional TV or film role, L.A. is about the only place you can do that with any degree of regularity. (I have a friend who makes a good living this way. It helps if you are not just big but also not ugly.)
Biggest downside is that there is a lot of competition out here. Gunter walks into every commercial tryout, for example. As for personal training, a good proportion of people with money are into keeping in shape out here .. but there are lots of bodybuilders trying to make a living through personal training. I would suggest avoiding Venice and looking for opportunities in the Valley or some of the South Bay cities. (That's true for housing as well. Don't count on buying property anytime soon out here.)
There are bouncing jobs out here .. but again, the competition is tough. For example, Quincy used to bounce (maybe still does) at one of the formerly trendier clubs. Again, it helps if you are not just a big body and not ugly .. L.A. clubs are all about the image.
The guys I know who take well to L.A. are those who are grounded, in stable relationships (I assume your marriage will count .. LOL), who IMMEDIATELY get another source of income out here, who have one foot in the Venice scene but don't live and breathe it, and who compete for the joy of it and not out of the illusion that turning pro will make them rich and famous.
As for L.A. generally, yes, it is very image oriented. But you are a bodybuilder, right? So what's the problem?
Seriously, L.A. is like anywhere .. there are good decent people if you make it a priority to find them.