You should be able to get chicken thighs for around $1.79/lbs. region depending. Chicken is also easy enough to mince into ground at home with a decent knife. Don't pay the premium for ground chicken. I'll buy cheap chicken and turn it into dumpling filling by mixing in mushrooms and cabbage and use that for a variety of things. Frozen dumplings being most of it, but whatever is leftover can be made into meat balls or added to soups and stir fries.

Also, don't skip the fish market. I can get yellow croaker for $3/lbs. or less which is a great way to add variety into your diet. I try to make a point of checking if there's cheap fish every time I shop and if there is, I'm buying just enough to cook that very evening. During trout season, rainbow trout goes to $2/lbs. This works well as fish is quick and easy to cook and it's best when it's very fresh. I'll usually braise the yellow croaker with lots of ginger and green onion in a lightly sweetend sauce flavored with doubanjiang, but it's also good steamed or baked.