I happen to live in Petaluma, CA- home of Mesa, in the Sonoma, CA wine country. Northern California is a fantastic place to live. Mild weather nearly all year around, 3 hours from snow, Yosemite, etc... San Francisco, the ocean, redwood forests, wineries all within an hour. World class food, entertainment, low crime in most of the suburban areas, and on and on.
Problems? Yeah, sure. Housing prices are among the highest in the nation. We've been hit hard by the housing/financial collapse. So, if you have some money, you can get great deals on houses right now. Even so, our "foreclosure" deals probably are still twice what most of you pay for a house.
For an amp tech, you also have the problem of the SF Bay Area being a major music scene, so there are plenty of music stores and techs. Most aren't that good. Moreover Andy, you'd be competing with the Mesa factory and a variety of other Mesa qualified techs who used to work at the factory.
So, probably the SF Bay Area isn't the best place professionally.
But, if I could live anywhere, it would be right here.