Aother vote for soups (no way to make a single chicken stretch further! Can feed 8 people easily!) Also, check out roasts - invest in a slow cooker and go with the cheap cuts because they can become tender and delicious when cooked properly! Bulk ground beef (get lean!) can stretch with rice pasta to make delicious spaghetti, or with properly prepared beans for chili. You can find cheap rice noodles at Asian grocery stores. Ingredients are just white rice and water.
We are on a budget too, but thankfully it is just the two of us (my hubby and I) but soups, roasts, and potatoes/rice are a life saver.
5'6" Female, 29 Years Old, 260/195/120
"Discipline is choosing between what you want NOW, and what you want MOST!"