need an exact feature clone of backpackit.com. Once the clone is done, there will be additional customization of the webdesign and several feature additions (which will be a seperate project from what you are currently bidding on). This site will be hosted on a linux server and you will be responsible for getting the site loaded up and working.
There will need to be an administrative back-end to the site to create classes of user accounts (so that amount of file storage, etc. can be defined by user type), and to integrate with paypal billing information. Again, you are bidding only on the exact feature clone and administrative back end.