UK online game developer

Hi, I am looking into the possibilities of setting up a website that will be based around an interactive online game, but as yet have not been able to find anyone that can help with the costing of such a venture. The general type of game is similair to the site www.fantasyisp.com however the idea is not identical, and the site would ahve to both look and run better. I was hoping if somebody could help me by giving an idea of the cost of such a site, and the cost of running it for, lets say, a year. Some general projections of this site are that it has the realistic potential to draw in 2 million visitors on a regular basis and it will also need to be password enabled to allow herding of the traffic to the appropriate areas I hope you can help me, and if you know of anyone IN THE UK that could realistically handle this job competantely, could you PLEASE post a reply to this message. Your help is appreciated, Ed Holder