Taking your example, that's 236 square feet per person. I have been living with no public utilities or water well for 6 years. After figuring how I was going to deal with my water and sewer works on paper I discovered most problems go away with the water. For example, when civilized I took 15 gal showers. I now take 1/2 gal showers and get just as clean. I don't have a water heater ... I have a saucepan on the stove,. I don't have a flush toilet. I have a post hole digger. About once a month I dig a 6" diameter hole 4' deep. And I deposit my waste in it. I have a metal plate I cover it with. In six years I've appropriated an estimated 16 square feet to this purpose and have redug all parts of it at least twice being careful to allow enough time for nature to do its work. No odor. No flies. No water. No hassle. My proposal for Gates is to buy them all posthole diggers ... less than $20 each. Back to your example, that leaves 220 square feet per person to do whatever else they need to do.