Greetings & Welcome!
I liked many of your ideas, but I feel like you're really missing out on the best stuff due to a lack of windows. Lots of windows, and an indoor toilet & shower really improve the quality of life, along with a permanent bed that doesn't need to be jostled.
Kudo's for charging your house batteries while driving, because you don't have nearly enough solar to keep them charged, and parking in the sun during the summer is the pits.
Wishing you both many great adventures! Keep us posted!