Wow, that is really close to what I had in mind, and helpful info. Cool! Literally! Appreciate you sharing it.
As I feared, though, with a price tag of $10k USD, you're halfway to buying a solid used car (preferably hybrid) with air conditioning... which could sleep at least two people fully reclined, plus kids or pets. So you might as well do that. I'd love to see a viable path to bringing this price down.
Regardless, there do seem to at least be niche applications even at this price point.