future web portal

I am working on setting up a new web site. This is hard to explain because i don't want to expose many details being I am trying to do this. but I need an estimate on how much a site will cost to build. I will only deal with company's that sign NDA, no indiduals. I need the code at the end, and the code must strictly follow all updated formating rules from governing bodies w3c [login to view URL], etc. If you cannot follow these rules then don't waste my time. Site needs: =Communicate Blogs, Forums, Mail-intrasite, chatrooms, =Search [login to view URL] style profile and search critiera with functional search =User Profile, Pic-rating system, video-rating system, Music, customizable homepage viewable to other searching and browsing, not like [login to view URL], like [login to view URL], friends, everything like facebook and myspace on the profile with different selectors =general site info 10+ sections of general info that is not dynamic, won't change for a while, hopefully =action site info updated news, product, calender, other reports =Admin Administration area to review everything in the database make changes- deleate accounts, bad pictures, update info, information from the webservices or imput manually from my team. basically handle everything from the admin area so I never have to touch the code to update the site! *All the function of [login to view URL] with alot of typographical changes *These are most of what I need, I want to implement things in phases and add as we go keep with the same developer/designer if suitable. *Site needs to be safe from hackers and what not *Looking to build in 3 to 6 months, but need accurate estimates and I want to choose a developer/designer in this search, i don't have to.