Theoretically it is a doable approach.

I would still have concerns about excessive bearing wear on the front wheel assemblies, uneven tire wear since only the fronts are down for extended periods, running tires backwards that were 'broke in' rolling forward and I don't even want to think about the damage if you ever forgot to unlock the hubs.

I'll be looking into the car trailer option. I don't think loading/unloading from a trailer is any more difficult than with a dolly. Storage of the trailer is really the only downside. I think the rig would tow better on a trailer anyway (especially if equipped with surge brakes).