That’s the way to do it. Just but say five dollars more each week and store the extra. I have a bunch of those 18 gallon plastic storage thingies full of you name it, Top Ramens, Knorrs soups, Oatmeal, crackers, whatever.
As far as gardens grow, I seriously doubt most folks could grow enough to live on (and I include myself in that), but there are a few things I would recommend:
Lettuce (it’s a freakin weed. a 3 foot by 3 foot piece of ground will grow enough to choke a goat)
Cabbage a very prolific plant. Quite hardy and very, very nutritious
Potatoes anybody can grow them. and they are the highest yielding crop there is, weight wise.
Tomatos another easy to grow item. Also high yielding
BUMP