Obama got a super deal on a house and land well below market in exchange for some favorable legislation and probable some future promises--you know like "you owe me".
Sort of like Hillary's $1000 investment (that someone else even put for her) that returned $100,000 a few months later. (Get the picture?)
Sweetheart deals--Obama has gone from taxable income of around $200K to over $4M last year in a matter of just a few years. He made nearly as much as Cindy McCain last year without having a business or any notable investments. It just shows you that he is a typical corrupt politician and is probably one of the reasons he is on the non-partisan Top 10 Corrupt Politician List.
Lee