Hi Dave,
there is a lot out there, all over Mexico, Central America, and South America. We are working on mapping the projects that stand out on a new permaclture communities network -
http://www.numundo.org/
Lake Atitlan, Guatemala you will find lots of little homestead farms. In Southern Mexico (Oaxaca, Chiapas), likewise, as well as Tepoztlan in Central Mexico. There is a ton out there - ultimate it's up to you who you choose to be neighbors with, and which country you decide to land in! There aren't really many good options in terms of responsible governments that aren't in bed with Monsanto. But there are places where the local people have essentially rejected government control in some areas (southern Mexico, Guatemala), which gives a very autonomous vibe!