Another thing, storage of large amounts of gas or diesel (hundreds of gallons) is very difficult these days due to all the permits and inspections required. Even more difficult to put underground, at least legally.
Propane is much, much simpler. If it leaks there isn’t an issue with soil contamination. So the requirements are far less for a large storage tank underground.
I have a 500 gal. underground propane tank for my standby generator...
Alot of helpful info that I am going to weed through. We want something quiet because if there are riots and absolute mayhem in our country (and the power’s out) the last thing I want is a loud generator alerting the looters to my house.
We’re willing to spend about $5k and my main concern is food preservation.