Several AJAX, PHP/MySQL small applications

I am in need of some PHP/MySQL, AJAX web applications. They are small applications and should not require that much time to create. The design (if any needed) will be provided by me. But all applications must be VERY easy to skin for easy integration into any design. The applications: “Buy a Link” With this application a visitor can buy a link spot on a webpage in a link block. How this works is as follows: A visitor buys a link spot then his link appears in a list with links to website. The rule is first in, last out. There must be a .config file in which the webmaster can set the configuration properties like price for a link, PayPal account address, how many links to display, price for bold text, etc. Example: Link to Website 01 Link to Website 02 Link to Website 03 Link to Website 04 Link to Website 05 Your link here? “Buy a Message Scroller Link” With this application a visitor can buy a link spot on a webpage in a message scroller. How this works is as follows; A visitor buys a link spot then his link appears in a message scroller. The rule is first in, last out. There must be a .config file in which the webmaster can set the configuration properties like price for a link, PayPal account address, how many links to display, price for bold text, etc. Example: >> scrolling message 01 - scrolling message 02 - scrolling message 03 << Your link here? “Pay to Win Game” With this application a visitor can win a price by buying a ticket. When the visitor pays a unique number is generated which he can input in a text box. When the number is entered he can press a “check number now” button. If this is the winning number the visitor wins the price that is set. The rule is every xx (set in .config) player wins. There must be a .config file in which the webmaster can set the configuration properties like price for a ticket, PayPal account address, which xx player wins, etc. “Buy a Rotating Banner spot” With this application a visitor can buy a banner spot on a webpage in a banner block. How this works is as follows: A visitor buys a banner spot then his banner appears in a list with banners. The rule is first in, last out. There must be a .config file in which the webmaster can set the configuration properties like price for a banner spot, PayPal account address, how many banners to display, which size banner allowed, etc. “Buy a Rotating HTML Advertisement” With this application a visitor can buy a HTML advertisement block on a webpage. How this works is as follows: A visitor buys a HTML advertisement block then his advertisement appears in a list with other advertisements. The rule is first in, last out. There must be a .config file in which the webmaster can set the configuration properties like price for a advertisement block, PayPal account address, how many advertisements to display, etc. “Lucky Number Game” With this game a visitor can win a price by using his lucky number. How this works is as follows: A visitor sees a block with rotating numbers in it, when he presses stop a number appears (between 0 and 10). After his “lucky number” is selected he can buy this number and see if he has won the set price. The rule is every xx (set in .config) player wins. There must be a .config file in which the webmaster can set the configuration properties like price for a number, PayPal account address, which xx player wins, etc. As you can see all applications make use of PayPal so some experience with this payment gateway is very much useful. I want all applications to make use of AJAX and data to be handled through PHP/MySQL, so experience with this is a must. Since it are not that difficult applications to create I am looking for a fast delivery time. Also the developer who is awarded this project MUST work on my server! Payment will be made after each one or two applications is finished. There is NO negotiation of payment or working conditions possible due to several disappointments recently and in the past. If this job is done the developer will automatically (if interested) be rewarded with another larger project for which another developer has let me down with: [login to view URL] I am looking forward in receiving your bids. Dennis