Custom QRcode site

Hello Freelancers! I'm looking for a team to build a a site that lets users create and manage multiple QR codes. Paying users will have the ability to add images and colours to their QRs. All users will have the ability to view stats of who used their code (location, home origin), with what application and with what phone. User accounts can be created on the site or created via facebook connect. Please let me know what work you have done that is simulare to this, how long it will take you and how much you will charge. Regards