Re: ***** Outage
If it's frequent, I'd get a small transfer switch with it's own subpanel with critical circuits going got it. I almost did this when I upgraded my electrical panel, but our outages are very rare and don;t last long. So I just have a small 2000W inverter generator to run my furnace or refrigerator or TV or microwave and a couple of lights.
So on that panel you put the furnace circuits, the refrigerator, the microwave and maybe one lighting circuit.... I find when power is out, bathrooms are nice to have power in.... just don;t use a hair dryer.
Then use ****** estimators to determine what size generator you need. If they really are frequent, it will be much, much cheaper to install a larger natural gas unit that turns on automatically, than a smaller unit. It's operating cost will be abotu 1/2 or 1/3 of a gasoline unit. But it will cost 3X more to installed.
Also, any permanent generator will need regular service just like your AC system or like a car.
1925 Two-Story Stucco Beaux Arts Neoclassical