My deciesed hunting buddy of 23 years, and I built a walk in cooler about 12 years ago that would hold 3 deer and a couple elk at the same time. [ He made a nice living working in the heating and referigeration field. ] It is about as close to a commericial unit as you will find.
We can actually bring it down well below freezing.
I have continued to hunt with his son ever since his Dads's passing and still use that cooler. Now thats a hunting related item I would hate to have to do without
We do our own burger grinding and sausage stuffing with it.
Then there is the smoker..Home-made using foil backed plywood. about 30" x30" and 5 ft. tall. It has it's own electric hot plate for the wood chips along with a oven coil in the bottom to help keep the heat uniform and thermostatically controled, with a handy drip pan in the bottom to catch any droppings. All of the meat, [salmon or sturgeon if thats what we are doing] is layed on horizontal stainless steel racks.
Guess you could say we kind of take it serious.