Any tips and tricks on where to start looking? Or am I off my rocker?
As someone else mentioned it may not be worth doing. Not only do you have to get this game to work, then you have to actually attach it to a cart system which of everything's JS-based maybe it's not so bad. That's assuming you have buyers that want to spend time messing around with this thing before getting what they want (an order placed).
If you have no technical skills you'd probably at least want to draw something and then try to find someone to build it.
Edit: I probably missed the point of your question too about "best design" as in real world practice or some software to draw in?
[Narrator: It was not, in fact, what people wanted.]