Today, I found out that something I wrote got featured on SFGate. Someone asked on Quora about the cheapest place to live for a year. I answered and SFGate republished it.
I have been to more than 30 countries in Asia, Africa, South and Central America and I would say that if cost is all you care about, regardless of the standard of living, you would have plenty of options to live under $300/month. Below are some of my favorites: