Barrel of rainwater and a case of canned ravioli. And the slingshot purchased at a yard sale.
Get a good slingshot=- practice a lot- and buy the right ammo- steel bearings- pellet rifles are also great to have around and are powerful enough to dispatch deer these days- but certainly rabbits, birds like ducks, geese, and even common birds, squirrels, raccoons, rats, etc- all edible-
Stews made with game and rice or noodles, potatoes, etc go a long way- be sure to boil the bones too for the broth- bone broth alone can sustain a person for quite awhile if need be-