I have a 36' MH on the workhorse frame with a gasser. I pull a Jeep unlimited Wangler with it. I will say the engine does get loud when climbing. But it is doable. As long as I don't let the the RPM drop before I start hill climbing it is fair on the hills. The MPG fully loaded and towing during my trips is about 6.5MPG. We travel about 8,000 miles a year, spend 6 months in TX. for the winter. To me it is more about the layout when stopped. That is where you spend your time the most. I could not justify the extra cost of a diesel MH.