I've had both diesel and now have a gasser. Since you only use it 3-4 times a year, why pay extra for maintenance and any needed repairs for a diesel when a gasser is much easier to maintain and parts are available at any auto parts store? If you find a FLOOR PLAN that you like, go with the coach that gives you the newest AC units, furniture, appliances, plumbing systems etc. You will spend more time parked than on the road and the newer gas units are very quiet. Naturally the cost for what little fuel you will use is less with the gasser but still the floor plan is really the most important.