advertising feature for Wordpress v2

A web shop, can register as a customer on or page. They register, and fill in, how much money they want to spend on the advertisements. We receive the order and manually send a bill to the webshop. When we get the money, we go in and activate the account. The webshop receives an e-mail when it is activated. The owner can now log in, and create advertisements in the system. These advertisements can now be assigned to some TAGS. These TAGS are places in pages by us (postings), and created by us. These tags are replaces by the advertisements assigned to the tags… it can be multiple advertisements. When the webshop makes an advertisement, they fill in, how many clicks they want to buy for this advertisement. When a visitor enters the page, where the advertisements are places, they can click the advertisement, and will be redirected to the page the advertisement points too. When an advertisement is clicked, the system must register this and remove one click from the advertisement. When the advertisement has no more clicks, its goes inactive, and an e-mail is send to the webshop owner, that the advertisement is out of clicks and is now inactive, and will not be shown on the page. I attached the full project description for download.