The fattier, the cheaper. 70/30 seems a good bet, it makes good burgers, good chili, good everything. It shrinks a bit when you cook it, but what are, some kind of hero?
Eggs are cheap, nutritious, and delicious. Make a Fritata, an omelete, fry them. Shit.
These cheap cuts are usually about $.69 a pound. That's five pounds for under $5. Spice it up and fucking roast it you fucking coward.
These are usually about a dollar a bag, unless you're an idiot who buys the expensive kind. Why would you do that? Broccoli, cauliflower, gren bens, etc.
Two words: Tuna Salad. Shit.
Don't forget big, cheap cuts of pork and beef. Throw em in the crock pot or smoker. Summon the fires of all the hells, praise Grak'nor, and perform his rituals. You'll do fine, kid.