I've done a collection of multiple food sources, at more expensive but wide diet varieties.
MREs, Mountain House, canning, plus dry goods like rice, flour, salt, sugar (for curing meat, lots of game in the back yard)
4 of us could survive fat/happy for 2 months, or 'eat light' and go 4 months before I'd have to shoot critters to survive.
Enough fuel and propane to last the generators 2 months. Enough fresh water (600 gallons) for about 2 weeks before we'd have to fetch it from the river behind the house.
If we're going to need food longer than that, then the world ain't worth living in any more. IMO.