I do historical reenactment, so I know an above average number of people with... interesting vehicles.

You can own any vehicle you want, as long as you don't use it on the open road. Making a ww2 willys jeep street legal isn't too hard, since its historical. Anything from before the 1960s doesn't need to meet pretty much any safety standards other than "have lights and brakes".

But the cyberstuck isn't from before then, and would need to meet safety standards. Only some of the requirements can be waived for special reasons, but not all of them. There's one semi-famous story of a group who couldn't get their "ww2-ified" 1970's M5 halftrack approved for the road because it's insufficiently historical, so they had to install 3-point seatbelts and such. Technically, a 1940's M3 halftrack could be approved, to they basically bought a chassis from one, and made the M3-of-Thesseus, where they basically kept the chassis plate, and replaced everything else. So now it's oficially a 1940's halftrack, with 99.95% 1970's parts.

I don't think that works for a cybertruck.