There’s lots of good shopping in Queens.
Seasons often has meat at very reasonable prices and sometimes has incredible bargains on other things (they had cholov yisrael milk for 99 cents the other week). Main Glatt has very good prices on chicken bones for soup (as low as 39 cents in recent weeks). Aron’s Kissena Farms sometimes has good sale prices. You can check their websites to see if it’s worth the trip. You can sign up for emails from Seasons.
Do you have a deep freeze? I think you can get a chest freezer for less than $200. Then you can stock up on meats when they’re on sale. You can also bake challah in large quantities (if you use 6 pounds of flour, you get the mitzvah of taking challah with a bracha, and you’ll have challah for a few weeks for less than you’d pay for two store-bought challahs).
Fruits and vegetables are a little more challenging in Queens. There’s nothing like the Brooklyn stores 3 Guys and Circus Fruits. There’s a store on Main Street near Valley National Bank that sometimes has bargains (they also sell allegedly kosher meat, but I’m not sure whose hashgacha, and it looks very unappetizing). Kissena Farms has had some good fruit and veggie prices, somewhat reminiscent of the pre-Arons days when the place was a dump, but they had bargain prices on produce.