No sane person wants to have to share a kitchen and bathroom with random transient strangers, as in the USA's SRO model. This is really where learning from other countries makes sense - in particular, Japan's high population density has led to the micro-apartment - that's a much better option, though probably still requires some regulatory overhaul (and isn't very compatible with car ownership as population density becomes too high):

> "Japan, particularly in dense cities like Tokyo and Osaka, allows and builds extremely small private apartments, often between 100–200 square feet. Despite their size, these units almost always include a private bathroom and kitchenette."