After 9 months in a diesel pusher, I relate perfectly to Ned's and Betty's answers.
I think it would be a terrible mistake to full time in a gasser, but of course, but I did not see if you were fulltiming, most timing, or weekending. Maybe I missed it?.
The only advantages I see in a gasser is the lower initial cost, and the easier self maintenance.
Diesel's are expensive to acquire, not question about it. If you try to save money on a diesel, you must either buy used, or make some difficult compromises in terms of size and features.
We were lucky that early on Bernie Dobrin gave me a heart to heart talk about the importance of buying a good diesel if you are going to live in it. His persuasion was so good, that I was able to stand up to my Admiral, two years later. Betty's answer reminded me of my Admiral. We would look at an expensive diesel, then step into a very pretty gasser like the Scotsdale, or a Southwind, and she would immediately fall in love with all the amenities. We found over and over again, that at the same price level, the gasser always offered more cosmetics and amenities for the dollar.
I held to my guns. My concession was that she got to pick all the options involving furniture, decor, kitchen appliances, flooring, floor plan, etc. But in return I called the shot on engine, chassis, electronics. As for cost, we had to sell most of what we owned (home, land, furnishings etc) to afford a house on wheels that would be reliable and last us many years. We wanted to be debt free so we paid cash for everything.
You need to take a firm look I think, at how you plan to use your RV. Heavy use? It is tough to get a gasser to last a decade on heavy use. Light use and light budget, a gasser makes a lot of sense. But think about down the road. As Betty's experience shows, if you don;t anticipate the future, depreciation will make it harder to correct your course.