That works if you have natural gas service. My estimate assumes solar panels, batteries and a generator that tops the battery off in emergencies.

This year, most people with just batteries lost power due to no sun, and people with just generators lost power due to no propane delivery service/supply.

Most natural gas generators are orderable for propane. Propane delivery is available most places, although you also need to find a place for the tank. It's more convenient to have fuel delivered via pipeline, but somewhat less resilient (although I personally don't have any experience with outages of utility natural gas, it is a possibility).

Based on the one ~ 3 day outage I had, my whole house generator's tank is good for probably close to two weeks, although if it were very hot or very cold, that might change. I have a portable generator for my well, that one runs on gasoline and doesn't sip fuel, I'd probably just run it for a few minutes twice a day (did not have that generator during the 3 day outage... we were just stinky)

Pipelines everywhere is also bad for leaking methane from a billion tubes