Just say you live in SF.
Use this: https://www.earthclassmail.com/addresses/ca/san-francisco
Bad thing is that you have to pay California state taxes and abide by California laws. If you like weed but hate guns you'll have a good time. If you like guns and don't use weed, you'll find some firearm laws restricting. Also, to keep up the charade it'd be good to visit once in a while and visit the DMV after you get a couple of utility bills and a lease so you can get a California driver's license.
The authorities probably won't check too hard cause you aren't causing any troubles. You are paying Cali state income tax and not using any services, where you actually live doesn't matter that much.