Asking how much you should pay to develop a game is pretty much like asking how much does a car cost.

I think the old adage that it takes money to make money is mostly true and applies here as well. Trying to put an app, especially a game, together on the cheap typically results in product that the customer doesn't have an interest in. Getting the right technical and creative resources together is critical.

Sometimes you can strike gold but if you follow this plan you might need to be ready for several failures before experiencing any success.