You mean it's like a Website flipping but only for domain names? Actually that's how understand it esp. from this line: "Buyers have total control of the domain while making monthly payments to seller."
It is a new concept and think new service as well. But not have much positive feedback for it. As if you offer same service means hosting financing then more people might be interested. It is my personal view. Even i think you should extend your service for hosting as well.