Events like part inside a Codeigniter site

Hi, the project is to develop an events part working on an already developed codeigniter website. We have the general site completed so you will NOT need to work on user registration/login, friend system and the template is already made so you will just have to code the part asked working directly on the general site. So you will have to create an events part as all are but with the only difference on the privacy and that the user who creates it chooses whom he likes from the people who are attending like bidding. Geolocation must be also used and paypal for sponsored events. The events view on a user must look like Twitter's stream. We will give you a mockup of it. Since the general site is already completed and you will only be working in coding this part we thing the budget is more than enough so please keep your bidding inside range and the time needed is an important factor. We do prefer persons and not companies so please include your name inside the pm.