Now that you are roasting over 5 Lbs of coffee at a shot, I believe you now are considered a 'polluter'. You will need a scrubber system to clean up your smoke before you release it to the air, and collect particulate matter, and chaff. It will of course have to be a certified system, approved by the government, installed by an approved contractor bla bla. $$$$. I don't know if fire suppression will apply too, think Gaylord system over a range or grill. As one starts doing some things in bigger quantities, they find that certain rules and regulations kick in, and that compliance can get VERY costly.
I hate to sound negative, but after starting my own business, got a very rude awakening on how expensive shit can get. Now if you are into customer service, and dealing with food, umm yah. Wait until danny the dirt bag decides he wants to make your business, his business, and conveniently slips and falls on the coffee he just spilled. Insurance can get costly too. If you are doing just roasted coffee it shouldn't be too bad, but any other food items and now we are talking bonded warehouses and all kinds of insanity.
Aaron