I fully agree with Tom regarding gathering some intel from those experienced in the field. My comments below are with the intention of further developing this idea.

You may discover that, as Tom mentioned, the "problem" (1) doesn't need solving OR (2) a solution already exists (that you may just not be aware of) OR (3) the idea / solution you have has already been tried and failed OR (4) though a "need" does in fact exist - the desire (by the market) to do anything about it doesn't.

You may also discover that your idea / solution, though perhaps far superior to the current solution (if one does indeed exist) would be rejected (again - by the market) due to the fact that the current solution is "good enough".

And I'd highly recommend you do your interviews face-to-face if at all possible. Prepare your questions in advance (to maintain focus and out of respect for their time). And record the audio of the sessions. (Just be sure to get the other party's consent before doing so - I'd get it in written form.)

If face-to-face isn't viable then skype (and record with camtasia) or do a google hangout.

Best of Luck!!