Sure, we live in an isolated area and have evolved through years of not even having a shop (well, I got to see one finally ~ 1980 or so). My father as young pre-teen helped support three younger siblings and a mother while his father was away at war by trapping rabbits and all that.

I had eighteen months as an isolated single parent with near zero support (long story) and had to stretch a marginal budget during that period. I've also travelled through the more remote parts of more than half of the 190+ countries across the planet, sorting logistics for food, fuel, et al along the way.

What I can pass on as hard earned lessons are that fast foods are rarely the cheapest or heathiest in the long term - if you can track down a large volume slow cooker in any garage sale or op shop on special you can keep a never ending stew on the roll by throwing in damn near anything, potatoes, celery, beans, carrots, bits of meat, swedes, etc.

It's hard to disrupt a system, difficult to break patterns and build communities and establish areas to grow food - but home cooking and stretching out food is something that can be found across the planet in the most unlikely places. Worth the effort to look for examples and make a few moves.

We're lucky to buy and prep all our food in bulk - it's more expensive on the infrequent shopping days, it's substantially cheaper over the course of year.

It's not something we need to do in current circumstances, it's a habit kept up in case it's ever needed and being frugal where possible means more to spend elsewhere.