Joe, I am wishing you good luck in your venture. Very cool. I know your wine will have lines out the door.
This is what I would ask.
See if the seller can stay on with you a few weeks to walk you along. Ask if any equipment, tools or material is part of the sale. Is the store name to remain the same? Do you need to establish credit with suppliers? Does he bank with a business friendly bank (Loans/line of credit)?
How long will it take to get a NYS liquor license?
Do you plan on making what you sell or just adding your wines to other mass produced products?