In regards to buying land/property/business I would only consider if I was to raise a family there, something that could be passed onto the kids. I've heard a few stories of problems down the line (not just in PI) when property was bought in the wife's name and things went pear-shaped down the line. Also heard a few success stories though, and they're always the ones who do everything by book and have been in the country for quite awhile.
