Another thing to keep in mind is your rear axle weight. My MH has a 20,000# rated rear axle. If I am going on a long camping trip (sometime we are staying in the RV and sometimes we are camping), living off the grid for a week or more we are pretty much maxed out on the rear axle. We travel with 100 gallons of water and usually a dozen different cast iron cooking pots and dutch ovens in the storage bays. My 5 gallon
Potjie pot weights 75 pounds by itself.
Our hitch is rated at 10,000# and we have a 10,000# pound towing capacity. Works well for us as we tow our Jeep 4-down which does not add any tongue weight. I also have a Roadmaster 10,000 tow bar. When we are staying in the state I pull my 5 x 8 trailer behind the Jeep with firewood, extra water and room for any thing I want to take along. This still does not add any tongue weight. If I was trying to pull a 10,000# trailer with 1,200 to 1,500# tongue weight I would be over on the rear axle, even with my diesel pusher.
Another great feature on the diesel is the Air Brakes. Look at any big rig on the road. They all have Air Brakes. The only way to go if you want to stop a lot of weight.