There is a very small handful of safe formula recipes and they are extremely expensive to make. So frankly, if the mass produced formula, which is the cheapest thing out there, if you're struggling to buy that, then making your own formula, one that's safe, one that will not ultimately send your kid to the hospital for nutritional deficiencies, it's just not an option for you. There is a reason why these kids used to just die. her own formula is a wealthy endeavor.