An open source application for an advertising website

Hi there,
I want to develope a website. It will be used for local advertising.
Specifically for tutors. Each teacher or instructor who wants to
advtertise, is given a single page in the site. The page is actually
his profile. Containing: his name, the subjects he teaches, the
experience (how many years he has taught classes?) and ... The other
main feature I need is a list of his students in his page. Each
teacher, tutor o insructor must invite his students to come to his page
and join his list. After a while that a certain number of students
exist in the list, a rating option is given to each student in order to
rate the teacher. (much the same way Amazon has a star-rated system for
each book).
It's gonna be a serach-based advertising site. Anybody comming to the
index of the website sees a text field ready to do the search. They can
search for the desiered tutor that they want.

DO you know any open source project on the web which be like or exactly
the application I described?
Any suggestions or advice are welcome.
Thank you very much

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