Not possible to visit inside. You'd have to know someone who works there. And if you did, you'd be under NDA with no photos allowed. You can see the parking lot but that's basically it. Fremont facility is much bigger and where the cars are actually assembled. Not sure about visitation there. Likely the same policy.
Anything in Sacramento?
Model S for rent here https://exoticcars.enterprise.com/en/vehicles/tesla-model-s.html And you cant visit plant. Unless you have a super special pass, you can always check in with security at the entrance. Also Santana Row in san jose has a test drive and showroom.
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