A few things, its essentially just a facebook clone with less people, therefore hardly anyone would use it.
Secondly, Facebook would never start charging people, simple because they have free competitors, and if they did, people would move to MySpace.
Thirdly it is IDENTICAL to Facebook in looks, therefore it won't succeed, you need something unique.
And lastly, if you honestly think you can run a successful social networking site by yourself, sorry mate, think again.