I am in the process of planning a venture related to a social web application targeted towards a very specific user group.
I need your help to do cost analysis of hosting my web application (on the servers).
Some information for this:-
The development of the project is being done by the founding members themselves, thus until now there has been no cost incurred for the development.
We're using all open source solutions for the development so no licensing fees are involved.
You may also ignore the expenses related to marketing etc of the product. Consider only the expenses for bringing up the site live and keep it running with users.
Of course that would depend on how many users are registered on the application, thus you may consider a sample size of, lets say, 100,000 users on the application.
The application is expected to have similar usage pattern as
linkedin.com. The application is viral in nature(spreads by users invites).
Let me know in case you need any more information.