I guess the trust is the big question here. How would people be trusting you ? You didn't even mention anything about the payment method or how you will be paying out people. Also if you can make profit, why not just buy btc from an international exchange and sell it on the India one ?
Yeah. I'm sure that he will not gonna use escrow for the funds since he will be personally trade it if ever he is legit. This service is very risky since the involve account is low rank and not yet trusted.