Sounds like a nice offer to make to friends. Sad thing is, unless they are already:
1. reasonably familiar with that area of Mexico and the customs there
2. homesteading, gardening or have previous experience
it would probably be a very difficult move for them to make.

Culture shock can be hard on a family. Add the hardship of having to build a sustainable lifestyle from nothing but raw land to this and you will probably see them leave fairly quickly.
Just opinion... it would really all depend on the families and the area they move from and to.