Sacramento County ban on home “major auto repair”

More power to ya, if you can insure 8 cars, pay registration on them, and drive them.
Then you're a lucky man, no issues with that, what so ever.
You must have a large driveway, if you can have something like that in your neighborhood.
How close are houses from one another, in your part of the world?
But in your case too, your code enforcement, might be keeping a eye out for you.
So keep it legal, and under their radar, would seem to be appropriate.
Some states, registration is cheap.
The insurance can be bought ultra cheap for a non running vehicle to meet code enforcement requirements.

Some states do not inspect vehicles every year.

Rural America is easier to live in.

Living next to rental property is YOUR problem. The landlord can do what most landlords did across the entire U.S. and raise rent high enough to keep out the rift raft.

For some reason, no matter how much they charge, people pay or go homeless.