I'm curious, Chisel, do you have sort of idea of how much water you could produce for your mega solar still idea? I'm always disappointed at how little solar stills produce, and I wouldn't be surprised if scaling it up even much larger still yields a pretty meager amount of water.

You would probably net a whole lot more potable water by going out and finding bottled water, or even draining water heaters. One big, commercial water heater could last quite a while. Security may be an issue with going out, but even at "the colony" they still had to worry about outsiders breaking in, so even a solar still inside your compound could make a juicy target that needs a lot of resources to defend, especially if word of its existence gets around. Anyway, just some musings.