I think you have a very good idea, *if* you can first locate a place to park it for full time use. Hopefully some CA folks will have ideas about where to look. I see at least 3 mobile home parks around Sacramento; definitely talk to them. Looks like you may be paying around $500/month in one of them.
I'd say differently if you were trying to do this in an area with extreme temps, but CA climate being what it is, you should be comfortable without hearing a constant roar from a fan (furnace or AC).
Good luck!
( edit: ) I may have been mistaken about the temperatures in Sacramento...