Yeah the EB5000X is tough, but if you're not putting at least half load on it you're wasting gas.
I would take an EB5000 over a generac any day though.
I think that if I am doing a whole home generator I might get a diesel. Diesel fuel is one of the safest fuels to store and we can buy it from the local farm gas stations where it doesn't have the road tax (but has the red dye so you can't use it on road)
We are kind of stuck with using a septic pump but as long as we have an electric supply we are good.
Our well is 1/2 HP and 210' deep.
For a really long term outage we won't be running 24hrs. We'll just use it when we're home. With that I can get 10-12 hours on 4.5 gallons of gas which means about 4-5 gallons per day, which is about $15 per day.
We have a large fridge, freezer plus I have a smaller fridge in my home office.