Looking for affordable rv parking in San Fransisco area

Thanks for your response. We have found most places in the bay area to be $65 a night and up which amounts to around $2000 a month so he would be better off getting an apartment in the city. I know the KOA in south SF was $75 a night but ill check on Petaluma. Living in an rv has to be more affordabke than vacationing in one. :-)