Re: Cradle with wheels?
jhock, if a trailer is kept on private property and never used on the public roads, there should be no requirement to register it.
But once you start talking about swiveling wheels, and crossing that up with a "trailer", you're going to get expensive. Swivels or casters are usually designed for very low speeds and not robust enough to be used on trailers, where much greater speeds and loads are involved. Trailers generally have only fixed wheels, for a rea$on.
Sounds like whatever you're aiming at is going to need brakes, too.