Facebook/Twitter Social Media Manager Web App

We want a social media management system for businesses to use which will manage there social media accounts on Facebook and Twitter. Accounts System: - Business accounts will pay and sign up - Have a set amount of user accounts - Purchase SMS Credits - Daily/monthly charges for different areas of site - User permissions - Multiple Social instances per client Analytics: - See graphs of views insights, follows, likes - Also verses competition's pages - Promotion and iFrame viewers Messaging: - Schedule posts and tweets - See messages directed to account - Reply to messages Promotions: (Installs a Facebook app which links) - Optional Like gates - Competitions with custom forms - Connect to SMS gateway to alert people they have entered or to click a link - Collect and push users email addresses for export or to MailChimp - Competition Manager - Select winners randomly create new comps. - Create competitions which give clients all options: - Have to or not to share - Post via OpenGraph - Get users information when using app or not (eg. sign in our not into FB app) - Promote via Facebook/Twitter - Provide templates and custom CSS settings and image uploading - Set exact sharing options - Responsive pages Instagram: - Easy connection to setup viewing photos of a specific user or tag Video (youtube) - Mini youtube page iFrames: (Install iFrame app onto clients pages) - Link to external pages So there will be these Facebook apps users can install: - iFrame - Promotion - Social Schedule App - Instagram - Video Sort of like [login to view URL] Need someone who has done something similar before. With option to easily add more modules at a later stage.