I traded my Boxster + $ for my pre-lit Westfield, and since I live in the SF Bay area and the 7 was in LA I had to tow each one way. I called Uhaul (Texas, I think) and after 20 minutes of working out the details they rejected my F150 w/tow package. Two more local outlets (there are about fifteen within 25 miles) and one competitor also said no.Finally I simply went to a Uhaul place who advertise themselves as 5 star customer service and they fixed me right up. My take in retrospect is that the Boxster was indeed a heavy load, though I made it, but the 7 was fine despite the trailer weight around 3000 lbs!
A couple of pages back someone asks about a super light tilting trailer. No one seems to have addressed this, which I wish they would because that rig looks quite doable to me. Unless you have to tow a Boxster on it, which wouldn't work out, I suspect.