Pumping water from a deep well is a huge power drain. It would be better to store the water, rather than the ability to pump it.
A 300 gallon tank isn’t that expensive, if you have room for it. If you place it higher than your highest faucet, you’ll have toilets and and wash water readily available for a while (lack of pressure will require treatment). Obviously, you would also need cutoff valves in your system to keep the water from flowing down into the well. A small gas generator cranked up every few days would then allow you to fill your tank in about 90 minutes.
I was planning for being able to turn the pump on and run it for about an hour, or 63 amps. I figured that would be long enough to run the pump and store water.