Plenty of water and crap you can eat straight from a can. Maybe one of those cheap grills from wall mart….the little hibachi ones are only like 20 bucks
Candles, flashlights, lighters, matches…dollar store is the best place for limited budgets
If you can get a used pistol or shotgun from the pawn shop, do so. If not, just keep a few baseball bats or knives around
Bleach can also purify water in a jam