My 2 bobs worth, been to the states 50-60 times can,t remember, always bought cars there , last time i lived there for just over a year , every state has different laws , eg in California when i bought corvettes the original tags ( number plates )
always came with the car , and stayed regoed , when in Baltimore ( Maryland ) whenever you bought a car the owner had to take the tags , so basically you bought it unregoed , i left there over 6 years ago , and if i remember correctly i had to put it in my girfriends name to get new tags , and i could only get insurance for up to 3 months after that you had to have a permanent address,so i just kept changing insurance companies , i was always buying cars ,even old camino,s most people i know who came over and spent a year driving around the states all bought cars , you bought and old 76 chevy cutless supreme for $400 and when you finished your trip you would just leave it in the airport carpark , much cheaper than renting a car, so i,m sure theres someway of still doing it , but then again , the worlds gone isurance crazy now , so who knows