Ultimately, if you want to take on a challenge like this, be prepared to buy everything in bulk, and be prepared stop eating meat, or eating very little. Agree

Ultimately, if you want to take on a challenge like this, be prepared to buy everything in bulk, and be prepared stop eating meat, or eating very little. Agree on the meat, however: Most folks that are poor simply cannot buy in bulk. If you are lucky you get paid once a month, but getting paid once a month also limits how often you can eat fresh vegetables. Canned might be your only option. If you don't get paid once a month, it doesn't matter if it is cheaper to buy 12 rolls of toilet paper if you can only afford the 4-pack. Or you might be able to afford bulk at tax time, but as soon as an emergency comes up, you can no longer buy bulk. Not only this, but things like transportation and storage become an issue. You may or may not have cold storage, freezer space, or containers to store leftover/bulk food in. You may or may not have a vehicle of any sort to carry the stuff in. Even if you have transportation, you might not have the money to use it (or public transportation, if that is a thing where you live). I'll mention that the unfortunate bit of $2 per day doesn't actually include only groceries, but other necessities as well. I don't know what the amount is in the states, but wherever it is, it doesn't leave a lot of room for anything but the most basic food. No spices. No chips since you can buy beans (or lentils!) and rice that last for multiple days cheaper than you can buy the bag of chips.