I heard I do not know if it is true or not but they are even cracking down and testing out of state stuff even people that are only visiting or have to stay for a short time and they treat them the same way as the people that actually live there imho that is should not be able to be don
I have not heard that, but it wouldn't surprise me. They consider it a California vehicle if it spends the "majority" if it's time in CA, or if you as they owner file CA taxes or anything like that. Either way he'd still be a CA resident since he actually lives there.
I once looked into it years ago to try and get plates for a dirt bike that was a 100% no-go as far as California was concerned. In CA your bike has to be factory street legal (they smog certify the engine design before it's released, they don't smog individual bikes) to ever get a plate. They stopped doing conversions 20 years ago. There are people who claim to know how to do it but they want you to send them the bike and a whole bunch of money and then just wait... no thanks.
All the options ended up being more trouble than they were worth, the SD plates would have been the easiest but also the most obvious if I ever got caught. It's pretty clear-cut fraud.