I looked at Port-au-Prince in Google maps' aerial photos and noticed that the low-end housing was in sizes about 10'x10' to 30'x30', about 100 ft² to 900 ft². I thought of wooden modular homes with two types of segments: one type would contain the core facilities, and the other type would contain two bedrooms. Each segment would contain two units (about 8'x8'x8') on either side of a central corridor (where each unit would contain half a corridor, and joining them together would create the complete corridor). The core segment would consist of a work (cooking/washing/hygiene) unit and a common area unit (and this segment would be reversible, with the common area to either the right or left). The bedroom segment would consist of two bedroom units. Each bedroom unit could hold one large bed or two small beds or, in a pinch, two sets of bunk beds. Each unit, regardless of purpose could contain at least one window on the wall opposite the corridor, and would have a simple, single-pitch shed roof. The smallest home would be just the core facilities where the common area would double as a bedroom, overall about 8'x16' or 128 ft². Larger homes would have one or more bedroom segments attached to the core facilities segment, allowing for 2-BR, 4-BR, 6-BR homes, overall about 16'x16' and 24'x16', 32'x16', etc and 256 ft², 384 ft², 512 ft², etc. People would walk through the front door into the core facilities segment, and the back/emergency door would be at the end of the corridor of the last bedroom segment. This would be almost a "shotgun" design, more like a double shotgun to either side of the central corridor. The units could be built and transported locally, and houses could be assembled on site.