Custom Banner Advertising System - PHP

Advertising System: (can be made from existing open source PHP script and customized) - there will be multiple advertisement locations on the site, all will be their own areas, LOC1, LOC2, LOC3, (max of 8 locations) etc… - staff will be able to start campaigns and end them, and campaigns will auto end on dates assigned when staff create them - when a campaign is started, it will send the information to the billing system to create the appropriate invoices, and the banner will start showing - the business owner should be able to login (control panel and login already created) and view impressions, clicks, etc.. for current banner campaigns running, daily, weekly, monthly, overall - users should be able to pre-book locations based on availability - users should be able to see availability on a small calendar for each spot, showing already booked spots for each location using something like: [login to view URL], booking up to 3-6 months ahead. - users must pre-pay for any locations pre-booked or they will not be confirmed - staff can reserve time blocks and/or assign them to specific businesses READ THIS - READ THIS - READ THIS Please specify what you will do whether it is code it from scratch or use an existing script with modifications. This will have to be integrated in a custom control panel and custom design.