Chula Vista, CA, South San Diego
I used to live aboard here four years ago. It was nice and quiet and generally pretty clean. The cost for my boat 36' has only gone up about $30 since I left according to the online calculator. 30' is the minimum length for liveaboard.
The only real bummer is that its long haul from Chula Vista to the Ocean. But the south bay is not far and actually a fairly nice little spot for a few laps in the afternoon if that's your kind of thing.
Generally there isn't a wait for the shorter slips. I honestly don't have current
info thought so give them a call.