8.1 millage sucks? I get 12 in my truck empty! I only get around 6.5 for the trip average in the motorhome which includes generator use. So yes I will not be surprised. As far as the weights go, I am expecting them to be higher. It is listed as 2600 pin weight and I should be able to handle a 1000 over that so I think I am okay. I will be using a 22K hitch that I have so that part is way overkill.
Well I made it back ALIVE!!As far as the Thor products, obviously the "D" rated tires are an issue, even the "E's" have given us trouble, but Your gonna have an extra axel to spread out the weight. ALL of our failures have been on the rear tires, I assume because of the weight in the back (1,200#'s of Rhino").I would look at the floor very carefully, we have to replace the floor in the cargo area and the under bed storage area, water has leaked thru the compartment doors and damaged the particle board flooring.As Donn said, we had to replace he sheetmetal screws that hold the angle iron supports for all of the tanks, I drilled out the holes and put 5/16" bolts/nuts in the place of the smallish self drilling screws.Hope that it has an Onan Genny, I have at least 2 friends over at BPMC with Gennerac Gennys, both have problems getting them going virtually every trip.One has had fuel pump/carb problems, the other has to use starting fluid most every time he goes out.All of the other stuff has been cosmetic and fairly easy to fix or modify.They have Tahoe's, I have the lower priced Wanderer.Hope that helps!!