Hello,
We have reviewed the information that you have provided.
To estimate the exact price and implementation time we will need a bit more detailed understanding of the project.
Imagine, you have the final product done and completed, in front of you. You could start with either mockups of every screen that you see. Or just describe in a couple of sentences what is there on every screen of your project and how it works from the user point of view.
We will implement this project using Symfony framework for PHP for the LAMP architecture (Linux, Apache2, PHP5, MySQL5).
You will have a backend with a CMS admin area, where you can edit content without any technical knowledge.
Best Regards,
Andrei