"William Brammer" wrote in message
I considered buying a 500 gallon gasoline tank but then I learned that gas
goes stale so that would only be useful for commercial establishments.

Anyway, there must be someone else with a similar problem that has found a
workable solution.



There are chemicals that you can add to the tank to prevent or greatly slow
any degradation. And, you can fit it with a condensation trap to preclude
moisture transfer. This plan could work if you have a place with enough
land
to keep the tank clear of the house.