You can get items at Costco that you do not need a lot of room for. Plus, you can meal prep and save time and money. It should not cost you $1500 per month to eat healthy food.
Again the point isn’t that there is a pathway to healthy and cheap food. The point is how much you have to do to get there. A few years ago you could shop at a single store and not meal prep to achieve that, now you do.