Budget has been a big part of this tree house being practical. I know that I want windows in this thing for a couple of reasons: I don't want this to feel like a cave and I would like a cross breeze. I have looked into buying windows, but the cheapest new window is about $50 at Menards and used windows on Craigslist are about the same price. This means I should make them from scratch. I made a couple that I think came out pretty nice. They ended up costing about $25 each, but it is still...
