How often are you w/o power and for how long?
A whole house generator comes with another set of problems. Maintenance and such. We experienced a three or four day outage many year ago and we called the guy who does the HVAC and electric in our house. We were all set up to have a whole house system set-up at a cost of about 6K. Well our guy dragged his feet and he called back after about 18 months and said he was ready for the install. We had had no outages of consequence in the time frame and I begged off. The missus needs med refrigerated, so i bought a hHonda unit to keep the icebox and a few lights powered. An earlier version of this guy. I have replaced the carb and battery twice in about ten years. They need to be run periodically. Good luck and get some more advice....
We were just out for two days from Monday's derecho.
We went out-of-county to get the last
portable unit a store had, a 1,700 watt Powermate I call 'little boy'.
700 watts freezer, 700 watts fridge, 100 or lower watts for small devices like the computer, CPAP, fan, and iPhone charger.
Switching out devices can also be done with a portable generator.
He could get a larger portable unit like my neighbors at 5,500 watts.
An electrical strip could run one lead to his well and the other to his house.
He needs to compare the wattage of these portables to his total needs.
Attach one device at a time due to starting wattage being more than running wattage.