I know for a fact in Amherst that a car can be unregistered on a property if it is in the process of being sold. I dont remember the actual legal speak of it, but to avoid getting fines we would just go buy a “For Sale” sign and put it on whatever side of the car faces the road. Thus its “Pending Sale”, i got away with this for over a month at my house, and boardjnky4 used it for longer than that.