After spending the past 5 years traveling a fair amount in travel trailers, including 250+ nights in the past 3 years, we decided to switch it up. The 27ft TT was getting to be too much, though...
I restored bus conversion years ago and now like to see others doing the job ;) Good luck on your project. Your list looks good. What I would add is electric water pump. You plan to have battery anyway and small addition will make lot of convenience. The hand pump reminds me sinks on BC ferries. They have separate faucet for hot and cold water. Both spring operated, so you need 1 hand to hold cold handle, 2nd hand to hold hot handle and how do you suppose to wash anything?