I think Ray and Chris's answers are spot on. I don't really have sponsors but I have friends that help me out, most have become friends after I've started cooking.
My meat supplier sells me cases of meat at cost and a couple times a year I cook him a case of ribs or briskets.
I get tee shirts for left over competition meat. I usually get 3 dozen a year. Dennis ( silk screener) thinks he's getting over on me and I think I'm getting over on him, It's a good arraignment and he has become a good friend.
On lesser extent a slab of ribs get my oil changed or a log splitter for the day.
You can lower the cost of cooking and make some lasting friendship with your food and meet the expectations of your "sponsors " with some creativity.