Have you ever had to push your car around? Very hard when it is possible at all. So let’s make a short distance car mover. Here’s one way to do it:
Put the front wheels on remote control dollies. Have one remote control work both dollies. The remote control would send two sets of signals, one for each dolly. The dollies are basically remote control cars with low speed/high torque motors and gearing.built heavily enough to carry the load.
The down side of this is that jacking each wheel would be required to put the dollies in place. Also, if the carts had roller skate sized wheels it would not be able to climb curbs.