Everyone seems to want to know about the cost of living in Thailand. Some think $500 is plenty for a single person (I don't), others think you need $1000. I think just about any amount is doable here but the level of comfort and freedom you get for $500 is going to be different from those pulling in $2000-$3000 or more.
http://www.youtube.com/watch?v=gK9btVrhLKs