Adding Aple iAD to existing App on iPhone App Store

This is a very simple project. I have a LITE version of my app on the iPhone/iTunes store. I want to do the following: I want to add the new Apple iAD feature to the LITE version of my app so users of my app can see ads at the bottom while using the app. Secondly,I want add a button at the bottom right of the app page with words "Upgrade." This Upgrade button will simply link to the Standard version of the app on the iPhone/iTunes store where users of the LITE version can choose to purchase the full version. Lastly, this LITE app sells for $1.99 presently on the iPhone store and we are changing it to a FREE app. We want to give the users the option of removing the iAD Ads for $1.99. We are looking for a developer that can do this in 3 days and have a budget of $50 to do this. We are looking to build a lasting relationship. If we can find a developer to do the job well, rest assured we have other projects lined up.