I made a dolly set up for my 2500 pound Lance with 2x12s. Basically, each piece (there are two) is a 4 footer with a two footer attached at each end with a hard rubber wheel of appropriate capacity bolted thereon. One section has a caster set while the other is rigid. That allows for easy maneuvering. I was able to lower my camper down on these easily as they were just a bit taller than the jacks would lower. I moved the camper by hand into my garage and set the jacks to keep it there. Total cost was small and they stored in a smaller area than if they were a one-piece frame design.