When our budget is tight, I buy rice and potatoes to stretch our food. I personally don't eat much of it because I don't need the carbs, but the other less-Primal members of the household do. I also try to use large, cheap cuts in the crock pot over several meals and use sauces to mix things up--for example I take a large boston butt and cook it in the the crock pot with neutral seasonings (S&P, garlic, paprika), shred the meat, and use homemade BBQ sauce on it one day, then salsa another day for a Mexican twist (topped with avocados from Aldi, cheapest place hands down to get them). Aldi is a great suggestion if you have one near you, I have even found that some of their produce is organic, just not advertised (or priced) as such. I always buy my fresh clean 15 produce there, particularly bananas and avocados.