This is my treehouse I made for my survival home. It was made 100% without cheats. It has a pumpkin and wheat farm, a nether portal, two floors, a beacon (a cobblestone tower with a torch on top), two armor stands, and 3 chests. It is balancing on one tree right now, and I never got around too adding pillars. The pumpkin farm will produce extremely quickly, and there is already a stack of them pumpkins in the chest. The mine went down to the bedrock layer, but I had to cut it off for the schematic. The problem with this is the nether portal. MCEdit actually cut off the bottom obsidian blocks and copied the portal part instead. I don't know if this will cause a problem in Minecraft, but you will need a couple blocks of obsidian if I don't fix it first. Check out the schemagic and I hope you enjoy it!