Build a Treehouse Without Drawing in Tomodachi Life

You can get tree houses in various shapes by modifying the house presets. Find a house preset and stretch the model upward first. Erase the walls, then use the wood stamp from the stamp tool to stamp the walls, and adjust the colors with a filter. Finally, drag straight lines at the dotted lines to create pillars, and drag straight lines on the front face to create stairs. (I prefer dragging at the dotted lines so both adjacent sides get the pattern.) The thatched cottage preset can be modified the same way — after stretching the model up, use the lasso to select the walls and squish them flat. Following this approach, most house presets can be converted into stilt-style structures, raising a building up from flat ground.