Hi all, My wife and I are discussing a backup water supply. We live on 5 acres with 3 wells (one good, one dirty, one unknown) and 2 houses (ours and a rental). The main/good well is out back, around 250-300' from the houses. It's 113' deep with a static water level very near the surface. We're mainly concerned about a prolonged power outage resulting in an inability to use the main well pump. We're discussing either a manual backup pump in the main well or an above ground tank near the house. We also have a generator that will be wired to run the well (soon). The manual pump will be $1,500 or so, a 500 gallon tank will be $500~ with plumbing for gravity feed and an electric pump. If it were you, which would you spend the money on?