Once you have the trailer attached to the tractor do you have to back up much or any?
Reason I ask is you could fab up a tow dolly, would be something similar to what you see a semi truck use to haul tandem trailers.
I need to go back about 1ft. I was thinking of a piece of box steel to slip over my drawbar, drilled and bolted to the existing drawbar, then drill and mount a 2" ball. I think that would be the cheapest...not necessarily the best.