If you are on food stamps, I’m not sure you’d qualify for a Costco Amex to get cash back, nor should you have $100 to buy the executive membership where you also get cash back. So some of the benefits I get out of it may not apply to this group.
I do not have a family to feed, but I had no problem joining Costco for a few simple reasons. The gas there is by far often the cheapest in the county. I don’t buy a lot there, but I do buy milk, wine, water, and the household goods that are cheaper per unit (floss, toilet paper, etc). Since these items come in such large quantities, sometimes I split the items with a friend, or I simply just store it and use it for months and months. You get 2 cards when you join so you can give the other card to either a family member, or you could give the card to a friend. Costco is pretty lax on verifying the in one household thing when you get 2 cards.
If you do belong to Costco and don’t have the executive membership, you should upgrade to it. If you don’t get at least $50 back, then you can ask for the refund between the cost of regular membership and executive. But if you do, then your membership can be quite cheap.
And I like being able to buy the occasional appliance, electronic, etc at super great prices.