First good luck - you must be crazy. NY laws are different than MI and sound a little like Florida with a commissary. As to personal chef as my HD in MI says there's no such thing legally. But a person can go to another house and cook for their party and accept a gratuity for doing it. To get legal is a whole other story and a lot of work even if you stay as just a partnership. Get a lawyer and draw up papers if forming a business enterprise even if informal. Trust me it's a good idea. The HD will work with you and you can get going for a reasonable amount if you want to cooperate. Obey the rules makes sure you don't PO them or it's a real pain for years.
And to everybody on this thread remember it's just BBQ and it's Christmas. I think I'll go back to my fresh squeezed OJ and vodka now. Maybe have to put lights on the palm tree soon.
Retired competition cook. BBQ mentor.