This really isn't as complex as being portrayed here. The GCWR, GVWR, & GAWR ratings are listed on a placard usually near the drivers seat. The hitch rating is important and is listed on the hitch. The OP can determine what the realistic tow capacity is. I would also recommend that the OP consider weighing the vehicle they intend on towing. It is a reasonable ask for a buyer to ask to have a coach weighed. This gives you a better idea of the actual weight of the coach. There are a lot of used DP coaches that may meet the OP's need.