Considering the tensions over the state of Mexico/U.S. immigration law, it's at the very least amusing to consider American workers streaming south to chase their retirement dreams. But great homes on Mexico's Caribbean coast go for less than $170,000 while places such as Lake Chapala are home to dozens of expat communities. It's not such a bad place for snowbirds, either. It's the only retirement destination on this list withing driving distance, and retirees can rent out their properties in the off months to cover costs.