What are you thinking for toppings? Like Jalapenos, Diced Onion, Diced Tomato, Sour Cream, Chili & Cheese? I would think you probably have most of that as your Hot Dog condiments except the sour cream. What will you serve them in and how much do you plan to charge? Sounds like a good idea, especially if you have a lot of teens coming to your cart. Good Luck let us know how it goes.