Database - user interaction - analytics

General theme: Web-based database with information to be pulled an presented to the user. User makes a set of selection(s) and information gets stored back in the database. Analytics provided on the basis of this user-database interaction. We will help with UI templates and look forward some elegant code that enables scores of users to use the site without any glitches. As an overview we need User registration - payment gateway - database structure (we will provide content) - UI/database interaction - analytics based on user response - (stored and shared with the user). Please respond with 1) samples of work of a similar nature or specific questions that you may have. 2) If there is one aspect of the work that you cannot do but are excellent at the rest, please let me know. 3) Rough time-line (days/weeks/months) Generic responses will be ignored. Thanks and happy bidding :-)