Hi Elena,
You do need to be USDA inspected. The fat comes from an inspected farm, but you're a "manufacturer" in this case, I believe, and the USDA will definitely want to make sure you're following the rules and regs. Same with a business license - you'll definitely need one, unless you were manufacturing the lard on the farm and might be considered an employee (but you'd still need that licensed, commercial kitchen).
All of the kitchens you named are great. I started at Kitchen Chicago, and Alexis was very helpful with business advice. More recently, I've done some work with Zina at Logan Square Kitchen, and she's also fantastic. You can't go wrong.
What sort of cookware would you be looking for? I buy mine from Jetro (Restaurant Depot) for the most part. Scouring Craigslist for restaurants going out of business helped me find my larger equipment a bit cheaper.
I'm not sure I have many packaging resources for you, as chocolate packaging doesn't need to be airtight or greaseproof. Perhaps google food packaging and go from there? You will need to have certain information on there for retail sale: net weight, city it was manufactured in, ingredients if more than 1, etc. Nutrition facts are not required unless you (or the farmer?) make more than 500k/year.
Hope that helps!
-Katherine
Katherine
Everyone has a price: mine is chocolate.