My house is all electric at about 1750sqft. This is a dual fuel generator. Propane/gasoline.
All electric heat will draw a lot of power. You’ll have enough to run the central heating, but don’t try to run stove and clothes dryer at the same time. Have you switched to LED lighting? Do.
Your generator is big enough to run pretty much everything in your house. My experience with a dual fuel generator is that it will only be able to use about half of a 20 gallon propane tank before the tank freezes up and becomes unable to provide sufficient pressure to fuel the generator.
better to run off of NG if you can ... no need to store propane or worry about freezing valves
propane setup should be extremely simple to convert to NG, usually just the twist of a screw
one big thing is making sure the battery used for auto-starting is tied into a mains-powered trickle charger
also, if you’re in an extremely cold climate, starting could be a problem unless the engine oil is heated
also, if you’re in a extreme winter environment, you’ll want to consider mounting the unit high enough off the ground that normally expected snow want suffocate the unit, which requires large amounts of air ... a nice shed top over the unit could solve that issue too, but those units throw off HUGE amounts of heat too, so you don’t want it totally enclosed ...
finally, keep in mind when locating the unit that those things are extremely noisy