Dodge - Diesel or gas?

For me driving range would be an important consideration. Taking a leisurely trip with frequent stops is OK but not if the stops have to be at a gas station. To get an acceptable range while loaded with a gasser you'd likely have to increase the fuel capacity so you might want to include this cost in your comparison if you haven't already done so. (I couldn't open your spreadsheet as I haven't loaded Excel on my new laptop yet.)

Another consideration is fire safety where a diesel has an edge.

I notice your drive of my truck didn't win you over to a dually {:-)