Also although the cost of living CAN be low, if you wanted to live cheaply and save money, you'd have to live like a middle class Thai person. That means no Starbucks (who the heck pays 80 Baht for coffee when you can get REAL thai iced coffee for 5 on the street). Even what we know as fast foods are somewhat middle/upper middle class.
The foreigners I know living in Thailand seem to live a pretty upper class lifestyle here in Thailand because their dollar goes a long way so I'm not sure how much they are saving. Then again, they're not hackers.
Even normal things that middle class westerners are used to could be considered luxury for the middle class Thai. Cable for example is pretty expensive compared to the cost of food and living and so is internet. Travel in the city can be dirt cheap if you stick to public transporation.
So again, you can stretch the dollar if you are willing to be fruga. Then again you can do the same if you choose to live in the states.
Check out this article titled 'An Experiment on Cheap Living from 1872' http://www.getrichslowly.org/blog/2009/05/23/an-experiment-i...