I've been thinking about it more, and I guess there are a few ways you could evolve the design.
David Baillie is right, it looks like it is meant to go on a hitch (so the bulk of it is built onto a trailer, and then they added a front
cabin with a smaller engine for smaller movement on its own. There are videos of it driving around a bit).
Then when parked, I guess you could do some type of stabilization (tie it down).
Perhaps a better idea would be to have the wheels on a hydraulic system that you could lower it fully onto the ground?