Was at a Moving Sale today and asked the people where they were moving to. They are going to Terlingua, TX to live on 40 acres with NO WATER. They plan to use rainwater in a place with only 11 inches of rain per year and they only have 628 SF of rain catchment area. At 600 gallons per 1000 sf, their total yearly catch would be about 3900 gallons IF it rains the full 11 inches. I asked HOW they planned to do it and they said they would live on 7 gallons of water per day. I wonder what they will do for a garden, washing, bathing, etc. No doubt you can live on that amount - theoretically - but what a miserable existence.