Ooo, I wish I could live in a tree house! I bet the light would be perfect for a studio. I think it would be a great way to pay homage to what the house is made of. How nice would it be to have a tree cottage.
Check out this site to see more tree house info--> http://www.re-nest.com/re-nest/gardening/treehouse-escapesbring-owners-closer-to-natureblogging-the-denver-post-076900