At a car show I went to a couple of weeks ago, one guy had an interesting trailer for hauling his antique car.
He bought a 18' travel trailer (with two axles) and gutted most of it. Then, he installed a huge door that took up the whole back end. The door was hinged at the bottom, so the door, when lowered, became the ramp into the trailer. Very clever.
With the windows blacked out on the inside, you'd never know there was a vehicle in there. Just another 'camper' on the road.
I suspect you could buy an old trailer for cheap, gut it, and then discard it (or continue to use it) in NY.