Almost ready to launch

Well it has been about 5 months since I got a dedicated team paid hourly from India, and we're almost ready to go. Fixed price contract development just doesn't work for anything beyond the simplest applications. This is something I should have realized as a former programmer, but I guess fear of an unknown cost got in the way of my better judgment. But in any case this team has worked out well. I am very happy with my decision to with PHP, great performance, plus a huge pool of programmers are available to me. Had I gone with Ruby on Rails my programmers may have been more productive, but finding developers is difficult, and performance is an unknown. So now I get to worry about the important part, will anyone want to pay to use my site? And how to market, provide support, etc. Fun...