My wife and I recently moved our 43 foot sailboat onto a coffee farm in the mountains on the north coast of the Dominican Republic where we are living off-grid; learning to farm coffee, bananas, citrus, and a variety of other foods. We are building a house in 2013 with many permaculture aspects including a dry toilet and gray water recycling.
I am a chemical engineer by training and my wife is a chemist. We both worked in the environmental business when we were younger, but we are retired young (mid-50s). Traveling a while by sailboat and living on solar power and collected rainwater and always close to nature definitely confirmed our bias toward a natural and sustainable lifestyle. We are making this coffee farm our permanent retirement "dream" abode.