Unfortunately in most of the Bay Area, even just the floor space to have anything remotely usable as a home gym would cost many hundreds of dollars per month.
This takes creativity. Gymnast rings cost ~$10 which you can hang from a tree branch. Someone gave me a barbell, but I had no weights. So I screwed rings into some heavy logs and am now deadlifting ~400lbs. I get to do all this in my bikini in the sun while maintaining my garden between sets. I look like a fitness model and spent about $30 on my yard gym.
The Bay Area is way bigger than SF, and it said "space", not "dedicated room". Obviously not everybody will have any room whatsoever but some folks in the Bay will be able to spare a bit.
