Good points. My purpose in the grand "experiment" is to find out what factors contribute to water production and what factors detract.

If a solar still, once dug, continues to produce a half pint of water daily with no intervention...it may be worth it. If you have no means of purification and can transpose dirty water into clean with it, it may be worth it. I just want to find out, rather than relying on (not necessarily useless) the consenting majority.

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Member of the toughest, meanest, deadliest, most unrelenting -- and ablest -- form of life in this section of space, a critter that can be killed but can't be tamed. --Robert A. Heinlein