Creation of social web site

Hi.I want to create a social network community,en english language first,same principe as myspace or facebook,i mean you can find your old and new friends,u can create u circle of firends,groups of interest,etc
1- u can choose what yours fiends acitivity interest you most,and you can turn off the others,like that you don have all your page filled with activities of some of your firneds what you are not interested.
3- In the community will be a dating service i mean if u want to find your soulmate u can mention this in your subscription,and your page automaticly wil be listed not only in community but also in dating section.The datings are posibile for single,married,gay and lesbian persons.
3- Later with first publishing arrivig at the site,the quantity of your firends will give you a posibility to turn your friends at slae percentage and use it at publishing adds listed at site.
4- The fonction of chat and video chat will be also included in posibility of community.
5- Creation of fotoalbums,giving persmission to pthers users look some of the fotos what you only autorise them to look,blog,posibility to write comments,
Thats all fot the momoemt,so i want to know your price for such kind of site creation and his development later .
best regards Elena