Ultimate Blog Marketing

My forums gets about 1,000 posts a day. How much should I expect to get, on average, from Adsense if I started using it a month? Right now I am doing no ads and I need to try Adsense to help pay for the site.

For example. If I wanted to know how much, on average, a home mortgage company was paying per click through using Google Adsense, is there some tool I could use? Thanks a lot!