The car is safely at the new house. The homemade dolly worked like a charm. Thanks a ton for the idea! A couple lessons learned:
1) Buy heavy duty casters big enough to clear bumps in the garage entry and the loading ramps onto the trailer. I used 4" and they needed to be about twice that big. All the larger ones at local hardware stores had larger but no locks on them. The locks are a must have.
2) I should have spaced the 4x4's closer together so they didn't interfere with the lift. I had to do some acrobatics to suspend the body to transition between the lift and the dolly that could have been avoided if I had thought of that ahead of time. I will have to repeat the acrobatics to get it back on the lift.
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