Same here, i need to move it around on level concrete, the "bump" from the pavement into the garage is about 2 cm high.
I can back up the trailer just into the garage after which i need to slide it to the side.
I've got some "skates" for the rear wheels. Gave that a go with a car of about the same weight of a Escape trailer, works like a charm.
I wil give the handpowered option a go, if that turns out to be to hard for us, we need to get the rig powered in somesort way.
Severinus and Yvonne