That is an interesting idea! I could even make a murphy bed with storage underneath. Although the air mattress is working out pretty decent for now.
I am feeling really good about my space, and the shed is paid for. Don't think I could do this lifestyle when I am 80, but for now it is good.
What kind of structure do you live in?
I have been staying in an eight by twelve cabin that I built last year. It also has a second floor that works well for storage but I may eventually insulate it and make it habitable space.