Tow capacity is 5,000 pounds and the listed curb weight of the Jeep is 3,785 pounds but with what I have it is around 4,000 pounds. The limitation is the combined weight and the GVW and I think anything above 5,000 would exceed the combined weight limitation. Not sure how all that is figured up but I once looked at the Winnebago on the Mercedes diesel chassis (Sprinter) and with all of the equipment added it only had a 3,000 towing capacity.

The rig doesn't sag at all when the boat is connected. One thing with all motor homes is when you go into a turn the back end swings out and I caught a boat fender on a pylon at a launch once. One thing my Jeep doesn't have and by law needs is a braking system but I'm leery as they tie into the existing vehicle brakes and another failure point.