I have a Chevy Silverado 1500 towing 6500 lbs (wieghed at truck stop) with 26 gallon tank, get 9.5 mpg and usually limit each run to refueling to 160 miles. Probalby could streach to 180 miles if I knew of a specific destination to refuel.
We downsized from a 28ft to 23ft. Needed to lighten up to back down a steep driveway and 28ft was right at Chevy Silverado 1500 limit. Less storage area is noticable but otherwise plenty of space inside.
Due to severe tire wear, I had my TT axle replaced last year for $600 including the cost of the axle. A local 18 wheeler trailer shop did the work. I sure would not try it myself but a mechanic type may tackle the job.
My battery drill is not strong enough to run each of my 4 stabilizers all the way up or all the way down, so I use and plug-in drill. I plug in to the 20A outlet next to the 30A at the camp ground pedestal. Works well.