Start easy and cheap

Water .... I keep refilling milk jugs, whether I need it or not, can be used for bathing and cleaning, if not drinking

Food...I can everything, ESP now when produce comes in, can dry or can fruits and veggies, and ESP meats

Fuel...I get a 2.5-5.0 gal gas can every paycheck and fill them. Store Nd rotate

Every payday I look for something else I might need. Go on a prep website and start a wish list and every pay get another item

That is at least a start. You can always add on from there.

Dont throw throw anything away....zip bags, alum foil, soda cans can be made into lamps and cookers, broken crayons can become candles, egg cartons can make great fire starter molds, dried leaves can become fireplace bricks....