Build an extra bedroom into an apartment with architect Dan Hisel's Z-Box. The Z, which stands for ZZZs, is a 12-foot-square, 10-foot-tall box that has a translucent polycarbonate shell, lined with Douglas fir. Inside, there's room for a bed, night tables, lamps, and shelves backlit with windows, while the outside has a bookshelf, and even a little dog bed. The idea is to set up the box inside of a large room, with the added benefit of splitting the area in two.
$18K? Does it make more sense to put one of these in a loft or to spring for a second bedroom?