HI:
Remember the movie The Graduate:"just one word, Plastics"!
Retirees, just one word for you "Costa Rica"!
What Mexico has got but missing the violence(but the not petty thievery).
NAFTA is going to change and hurt Mexico so prices will drop but so will their standard of living which equals more crime.
Two teacher pensions:stay up here/rent down there. 
We have friends that did the Lake Chapala move(bought a B&B).
It turned out to be a Mexican version of "Green Acres".
They live in Bobcaygeon now.