I have a smaller home than most on here I am sure 1500SF but 2600 under roof.
Had an electrician put an interlock on my existing panel. Have a 9000-watt Blackmax with 13 hp Honda. We have a gas water heater, furnace, fireplace, drier, and range/oven.
with everything on the gen is putting out at 28% of the available total 100% load. with the microwave off using 16-18% and at that rate tank of fuel last 15 hours.
I have some smaller VP racing fuel 15-gallon drums and a hand pump. But will one day convert it to NG as we have it. I simple kit is not much $ but running the gas line is $
Note that we had a Briggs powered 4000watt that was using more fuel with the 8HP cast-iron sleeved engine
We run it every 30 days under load and keep all gas with stybil in it. Gas has never been a problem going bad. even used 3-year-old sealed drum gas no problem. Stybil also sells 360 so it coats the inside the tank to prevent rust.
In the past, my old Generac with Briggs (1992 they do not make them like they used to) ran all the 110 for 7 days after a hurricane and the same goes for the Honda-powered but the Honda engined one way outperformed the smaller one and used less fuel.
I saw someone posted larger uses more fuel that was not the case for our use of a larger one less taxed used less fuel
In addition to the every 30 days run with load, I do oil changes with Mobile One
We sized Larger since the NG Conversion will put out less BTU and put out less

See if your local utility offers something like this - http://www.generlink.com/ or http://www.generlink.com/generlink.html - that is what we used works great - simple and safe but the utility has accept/support the installation.

Just grab the handle, what could go wrong....

https://medicalxpress.com/news/2021-08-portable-recalled-amputates-fingers.html

Quote

An unlocked handle can trap users' fingers against the generator frame when the generator is moved, posing a risk of finger amputation and crushing,

Having spent several years in engineering some of which involved "idiot proofing" convinced me that no matter how much time & effort was put into the concept, the the first person to walk up would think of something we didn't. And the above article is another example.
It also reminds me of a ex co-worker that had his fingers in a MANUAL sheetmetal brake like the one shown and managed to fracture all 4 of them. WHAT PART OF STOP PULLING ON THE HANDLE WHEN IT STARTS HURTING didn't he understand???
Evidently the same part that the above idiots didn't while lifting the handle to move their generator while it was unlocked. Wonder why the MFR. went to the expense of putting a lock on the handle
Proof that Darwin's offspring walk amongst us and are breeding

If you can afford a Cummins Standby generator, they power the entire house.

Yeah the gasoline units really are crap. There's no NG in my neighborhood so I try to periodically run the generator as well and not allow old fuel to sit in it. I guess the next best would be a propane powered unit.

We only have propane available, so I went with a gas unit that will do what we need. I will be running it every 30 days under load, use Staybil 360, and run it dry each time.
Thanks for all the ideas and suggestions.

I plan to use my large stand by to run the air compressor to keep it fresh and cycling on a regular basis with fresh gas.