HX_Guy - You mentioned collecting in SF - be careful as you have to pay CA sales tax if you collect there. As long as your location is higher than 9.something you're OK as you can offset (probably) but if lower - you do not want to collect in CA. I see you are likely buy new, but thought I'd mention it in case another inventory one catches your eye.
Hmm, is it different with Tesla vs other car manufacturers since they don't have a traditional dealer network setup?
I've purchased two cars in California before and drove them back to AZ. All I got in CA was a temp registration, never had to register it and didnt pay any sales tax. If I remember correctly, the dealership set up everything based on AZ taxes.