An auto car on a tow dolly?

Out of curiosity I checked out the local u haul website for auto haulers. It said a car dolly is like $44.95 to rent and their actual car trailers are like $54.95. For ten bucks more if tour rig has the ability to pull it, why mess around with finding extra tires hauling it on backwards or whatever else. Lol, rent the actual trailer and forget the dolly and stress of it fitting, tires blowing out and all the drama that goes with it. If you have a problem with the trailer, it's uhaul that has to fix it.