The problem is everybody could say this. You cant ask for a investment without any showing or proofing material. This is not cause everybody think you a scammer - this is because everybody want to see that's real.
So show what you got so far.
As I said above, I'd be happy to show both the GDD, and the Monetization Documents to anyone who was interested. I can send them to you if you'd like. Just pm me your email address.