The way to do it is to individually grind, mix, & stuff each customer's meat, but then label the racks you use in the smoker, and smoke multiple customers' product at once. Have set weights required to make a batch to standardize batches, put the balance into hamburger. Not terribly difficult- I've done it before.Most all of the processor I’ve ever met mixed meats for snack sticks or summer sausage. One guys deer isn’t enough trim to warrant running their smoker. I’m not even sure how you would be able to do it and stay at your profit margin.