So would you go with a built in propane generator today?

Doing the math, you MIGHT get two days run time per 30lb bottle. 1/2 gallon an hr and we run a 15k AC in a 31ft 5th wheel that runs 75% of the time. A TC will use less, I'd stick with the Honda. The hard start capacitor really helps and is cheap and easy to install. Try one if you can. ( I use 2 and the extend tank using about 20-25 gals in a week at the races). My TC that I'm building will still use the Honda's until I can scrape up the money for a Dsl gen to run off my back tank.