I don't think I would put Dollys under the jack feet. My idea would be to make a platform on wheels. Then it will depend on the surface you have to move on. When I had any of my TC's the surface was grass or gravel, so not sure any dolly would have worked. If flat and no lip some hard composition wheels should be OK, if any kind of lip, like driveway to garage floor, you would need a softer composition.
Putting the legs on a dolly unless all dolly was solid just sounds like an invitation to disaster. Maybe steel with X tinning goners might work OK?