I am more than half way through this book Will It Fly by Pat Flynn. He lays out this pretty easy to use method to help you build a market map and do customer d

I am more than half way through this book Will It Fly by Pat Flynn. He lays out this pretty easy to use method to help you build a market map and do customer development for free. I would say give this a try and you may get more data to make a better idea if your building something that solve an existing problem people would pay for.