Hi,
As you can understand, its not really possible to quote an amount before knowing the full details of the social network that you are trying to build.
All we can tell you is that currently we are engaged on another project with a big client of ours who is developing a very unique social network. We are NDA bound so we cannot reveal the details of its "specialty". However, technically speaking, we are right up there.
We are using PHP 5.0 and MySQL along with NoSQL for recommendation engine. We are using advanced PHP 5 features like Memcache and PDO.
In a nutshell, we have gone through a learning curve that is atypical of social networks. You wouldn't get too many qualified service providers in Freelancer who will have this advantage.
Now, let us introduce ourselves.
We are one of the Top Rated coders in Freelancer with reputation of 4.9, more than 200+ positive reviews & 92% completion rate. We are also one of the very few “Certified Professional" in PHP, Computer Graphics, XHTML, HTML & SQL.
If our bid and our Freelancer Profile and our client feedback history at Freelancer, sparks any interest in you, please do get back.
We will look forward to hear from you,
Thanks,
Dilip