I've seen a few houses with those giant Generac units which are overkill IMO. You pay through the nose to have automatic backup power that switchces when the grid power goes out. Better to have something that isn't permanently attached to the house and is portable.
I live in a remote area along Georgian Bay. There are literally two houses at the end of a 4 km road, so you can imagine how Hydro prioritizes us. We also lose power a lot here. I think there's basically one wire that runs up the Bruce Peninsula.
I have a 5000 kW generator that is semi-permanently wired to the house. I also heat primarily with wood, and my stove and hot water are both propane. So the genny is mostly for my water pump. I travel a lot and in the winter, I drain my pipes and pretty much let the place got to sleep, with the electric heat on just enough to keep the frost out. So I agree, having the flexibility to move a generator around isn't a bad thing. I use mine for a bunch of things, but I also lock it up in a shed when I'm away so it doesn't grow legs.
As for preparing for a grid collapse, I have enough canned food here to last for weeks, but mostly because I bulk shop when I'm in the city. The lake is only 50' away so water isn't an issue even if I can't keep my pump going. I have about 30 face cords of wood currently, so I'm good for heat for a few months.
Living in the boonies, adjusting to a major grid collapse is a lot easier than it would be if I was living in a condo in downtown Toronto.