To bad you did not demonstrate it on that dirt and lose gravel. It seems its just a gizmo around your house with hard smooth surface's. Dont get me wrong its a insane gizmo but I need something anywhere my wife is disabled and cant help, so if its to tight for the vehicle to get what you need this is the solution. How heavy is your unit?
I made something similar and it just couldn't get the traction on my lawn, as soon as the caravan hit a small lip on the driveway it was basically bogged. I think the ideal mover is the fully remote one that locks onto the wheels. You can then stand behind the van etc to not hit anything. You don't have to lift heavy jockey wheels etc
