Membership site using wordpress plugin


I am working on a membership site using wordpress plugin called s2 member. The theme of my work is to work on a particular niche in a city and create quality content related to niche. making website a great information source and a decision making point for visitor.

I am planning to make that site a lead sharing paltform with registered members with our site. that is vistors looking for particular niche related consultants or services will be sharing requirements on our site and at the backend we will be sharing those requirements with our premium members, with some monthly subscription fees.

does this type of business model work ?

any examples of successful web platform like this ?

what are technical things i need to consider apart from s2 member and payment gateways.

your replies are much appreciated thanks