If you know how to cook from scratch, using staple ingredients, it is possible to eat well for relatively little money.
That’s how my mom did it. We had a large family, and for much of that time my dad was not making a whole lot of money.
I moved to south central KY from Seattle 8 years ago. Just from my own land I can find, growing wild:
Onions (too many)
Poke (and various other greens)
Acorns (but you have to be hungry to bother with those)
And those are just the ones I know of and have actually eaten.
Then we have
Racoon (Some eat them)
Possum (but you have to be starving to eat those things)
And then there is the garden, chickens, and even cows if necessary.
And outmeal in bulk is around $.70 a pound. And a pound can last me weeks.
We very rarely eat at restaurants, making eating very low cost. I think part of it is just being old. When we were younger we always wanted to try out the latest new restaurant. Nowadays, we actually prefer to eat at home. And my wife is an amazing cook.