It’s probably worth giving a try - I usually bake my own bagels and that’s an economically reasonable activity… I’d be worried that cereal would be unreasonable to do without a dehydrator or other specialized equipment but there’s a lot of cook-ready food you could make. Pickled veggies and peppers are amazing, perogies or dumplings are easy to make in a freeze friendly manner, spaghetti sauce is insanely good vut usually doesn’t freeze well - that’s a classic example of a dish where it takes equal amounts of effort to prepare for two people or two dozen.

Cereal might not be the best but there are alternatives if you can get a group together… especially if you can cut across food cultures!