holy crap, you people must be incredibly wasteful/buy shitty box food or something. ^As I said, the budget for two was as low as $300, pretty easily...and also like I said, I don't really do this anymore.
Whole chickens are cheap, and one can provide material for almost a dozen meals: either roast the whole chicken, or pressure cook to make stewed chicken (for brunswick stew or other things, and the broth reserved for tons of things). That's a ton of calories for like, $5.
A pork shoulder can feed me for more than a week--not every meal, but most of the meals. Key is to shop on the outside of grocery store. It's cheaper, fresher, actual food. If it comes in a box, it's wasteful (expensive) and terrible for you. ....not that I'm exclusively anti boxed food, but if you do want to see how easy it is to eat "proper" and do it cheaply, then you should avoid it.
It helps to be able to tolerate eating the same/similar meal most of the week. I get that not most people enjoy that, but I like what I cook and can eat it for a while (and yes, I will get sick of it). Also, you people need to be drinking your Metamucil, whether you accept that or not, it's essential for everyone, and is also a great appetite suppression/snack/meal.
I make a vat of rice and beans (black beans; a single 500lb bag--again, if you're buying canned beans, for anything, you are buying garbage and throwing money in the trash when you do that)--with chicken and sausage and smoked turkey legs and the broth that I make myself, and this lasts for about 2 weeks. easy pressure cooker meal. And yeah, that does get old.
I had it down to just under $2 per meal for nearly half of a year. Yes, that's insane, but it's not that difficult. I eat more than a child, so it's absolutely ludicrous to think you'd need to spend 3x more ....of course, I know kids are picky and obnoxious with their taste, so there's not a whole lot you can do there to keep them happy, but kids also eat what they grow up with.
Train them on Pop Tarts at your own peril I guess, lol.