I buy as much as I can through a restaurant supply company and that saves us about 30% across the board on food. 50# sacks of flour and oats, 25# sacks of sugar and salt, bulk spices, frozen fish, things like that.
You’ll get better cuts of meats from Restaurant Suppliers.
And they run sales too. Buy a whole Ribeye Bone-in or Boneless or Tenderloin and cut your own steaks any thickness desired.
Make your own ground beef: VERY IMPORTANT TO START WITH VERY COLD MAYBE EVEN JUST SHY OF FROZEN!!! Collect all the trimmings from cutting steaks including the fat and save up a pound or more then pulse cut it in a Food Processor using the BLADE and PULSE CUT starting with the meat at a COARSE CHOP then add little cubes of the fat to finish with a finer texture (but be careful not to make Pâté) the fat helps in binding and flavor and make the best Burgers/ Meatloafs/Beef Enchiladas/Tacos/Pasta Red Sauce/meatballs ever. You can even add spices if desired while processing.
With cutting your own steaks the cost comes out to $3-$6 each vs $15-$30 at the meat counter or restaurant. It’s a big investment but pays off in the long run.
If you do go with Bone in they can be trimmed out and roasted in the oven to make your own demiglas or stock.
Check the prices on other items also: fresh fruits and vegetables, cheeses, heavy cream (fat content* 50-70% vs grocery store is 40-50%) and other dairy and such. Again the size/cost may be a big investment but cost things out to see the savings. You will get better quality fruit/veg as well.
*I know it’s fat/calories but that’s the difference between most home cooking and restaurants.