So a tow dolly sounds like a grey area? I would still call it a trailer because it is connected to a ball and has an axle and lights. And yes empty it is perfectly legal to tow, once you strap a 3k, 4k or 5k lb vehicle to it it becomes untowable to me, at least the common sense side of me thinks that. He doesn’t do any mechanical work so anything it needs I’ll be doing. It has the ability to add brakes, which if it were mine that is what I would do.
So now I have to ask, how many people have a braking system on their toad? whether it be built in on a 4 down toad or on a dolly axle?