Design a set of small wooden dwellings floating on sturdy rafts in a post-apocalyptic environment. The dwellings are to be rustic in appearance, with natural wood and a compact but functional structure. These floating houses are organized as a community, connected to each other, reflecting a sense of cooperation and sustainability in a desolate environment. Each raft is to be equipped with tomato gardens grown in small containers, providing a green touch in the arid landscape. In addition, it includes solar panels and helioelectric generators strategically distributed to capture and store clean energy. It also adds storage tanks and water purification systems, necessary for the inhabitants' self-sufficiency. The surrounding landscape must look abandoned and hostile, with dark or cloudy skies contrasting with the vitality of the floating community.