Banner placement on Real Estate related websites

I need 100 banners placed on internet websites pertaining to the real estate market in the US and Canada. These need to be free banner postings. The websites that the banners are posted on need to have an Alexa rating of 100,000 or better. I will provide the banners all you need to do is find the web sites that are related to the Real Estate market and post the banners. These banner placements need to be good for at least 7 days preferably 30 days. I want an excell spread sheet with a link to all the posts so that I can verify the job completion.