Build to think
It's best to explore new opportunity spaces through prototyping. To try to model it all out in your head is to explore the opportunity space in your imagination. You'll only find what you already know.
Prototyping is the process of following loose threads in the knot. You'll learn more about the space and spot opportunities you didn't know existed. You'll also find that the risks are in places you hadn't expected.
I'm figuring this out as I go. One's ability to articulate an idea always lags behind the understanding of the idea, and the understanding of an idea often lags behind the embodiment in which it is first given life. It can take a surprising amount of time to come to understand what a prototype is trying to "say" and longer still to say it oneself.