George visits a futuristic living space at YO! Home, where the double bed rises up out of the floor, and into the ceiling, and the kitchen and bathrooms are cleverly hidden from view. Inspired by this design, George and William put together the main rectangular living area for the tree house, and prove that by folding everything into the walls it is possible to place the kitchen, living and bedroom into a 12-square-metre box. George also meets a couple in the Wirral who are willing to put all their savings towards building the ultimate wilderness beach hut.