There is probably close to zero technical cost or risk associated with your social network. I have no idea what stage your concept is at, but from my brief flir

There is probably close to zero technical cost or risk associated with your social network. I have no idea what stage your concept is at, but from my brief flirtation with building a social networking concept, I would urge you to consider the following if you haven't already: What problem does this solve? Who are your first 100 customers? You'll be surprised at how little time even your best friends will spend humoring your service. Who are your first 10,000 customers? Why would any of them spend their precious time on your service? How do you solve the chicken and egg problem? Most social networks won't be interesting until they have millions of users. How do you keep people engaged before then? How do you make money? If you have a general audience, unless you have hundreds of millions of unique visitors per month, don't say advertising.