Ideal places to create a free social network

You have a business idea that goes around the head can yield income and if so it generates is necessary ideal places to create a free social network, so that it works with total flexibility and in a massive way.
The need to create a social network is to cover a sector of the market, a certain niche that will identify this idea of business, targeting a specific audience as young University, fans of a specific computer for a certain sport, among other examples.

To create the social network and this begins to have popularity, it will begin to generate revenue through advertising and also through payment links by subscription.
Within the options there is Boonex is free provided that there is a link directed towards them, but
a license payment eliminates the link.

Within this BudyPress as a social network platform alternatives to meet people with similar interests as well as to share them.
The more correct option when you have the idea to create a social network of importance and different is use BudyPress.