Whoa that is really cool. If I were you i'd go for the second NAPA store since the first one seems like a success.
Are you going to have it in a different city/town? One of my professors last semester owned a couple KFC's. He was the most knowledgeable business guy I have ever met. I can't wait to have him again.
I guess there really is a lot of money to be made in franchising vs. starting up. After your royalty fees all that stuff.