Here is a little more along those lines. You may also want to talk to your current insurance agent. Mine gave me some limits to sales, from home, that would not violate my homeowners insurance, and force me to get additional business/ag insurance. I currently do not know all the answers to my questions, and they are similar to yours, so I am doing my homework as well.
http://ij.org/case/wisconsin-baked-good-ban/
2013 15 Homemade Taps, Milk Jugs, Turkey Fryer, 3 Gallons Syrup
2014 Finishing my college degree, looked longingly at the Maples all spring
2015 26 1/2 Real taps, Milk Jugs, Homemade 20x25 pan on propane, 5+ Gallons Syrup
2016 50 Taps, Milk Jugs, Homemade 25x48 pan on propane block arch, 8 1/2 Gallons Syrup
2020 80 Taps, Milk Jugs, 25x48 pan on propane block arch w/preheater, 10 gallons syrup