I should also add that one thing I do to stretch the grocery budget is to cook dried beans and added some rice, veggies and protein to it. Maybe once a week to eat for my DH and kids. I don't do this myself since I am the one with high blood pressure and overweight but since the rest of the family is not primal, I figure it is better than grains? Cheaper anyway.
Edited- I did find a couple of threads on feeding a large family. So tips I have found for budgeting. I may add to this list as I find tips.
1. Buy meat on sale doesn't have to be the more expensive grass fed. (I do this already and have for years but I do need to investigate cheaper meats, I love my crockpot anyway as it is easier to throw in before heading to work. Bacon may be too expensive unless it's b1 get 1 free like we found recently.)
2. Supplement with rice, potatoes, and dried beans which aren't as primal but better than other starchs and probably cheaper.
3. Eat more eggs as they are cheaper and good source of protein.
4. Buy fruit and veggies that are on sale especially seasonal ones. (This month I have found a lot of buy 1 get 1 frees with spinach. )
5. I also may cut back on milk as a cost cutting measure. They way overdrink it. Since they won't be eating as much cereal, they won't need it anyway. They can drink more water.