Hello,
We have reviewed the brief information that you have provided.
The accompanying bid, along with the time estimation is more a placeholder. The description of the project is currently very general. We need a more detailed description to make a proposal.
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.
You will find examples of our projects and their descriptions in our portfolio here at http://www.freelancer.com/u/devexpertsteam.html
Best Regards,
Andrei