I too love Mexico but I doubt that there’re will be a mass migration of Boomers to Mexico.
Think about it, $300k for a house in San Miguel de Allende is a fortune. You can buy a house for that in Orlando, Atlanta, Panama City, Tampa/St Pete, etc…
Retirees will want to stay near their children and children will not want their parents spending their inheritance in exotic locales.
I also want to echo deadzone’s comments that living a 1st world life in a developing country is quite expensive — more so than in America. So unless you’re willing to lower your standard of living, living in Mexico would not cost less.
Americans are not the adventurous types. Few will want to move to a country where English is not spoken.