There are thousands of expats, mostly from Canada and the US, who live in the Guadalajara/Ajijic area and also San Miguel de Allende in Mexico. Excellent climate, lots of history, very good food. A more stable government and currency.
The grass may not be much greener on the Mexican side of the fence.
I spent a month trying out San Miguel de Allende about 10 years ago. The elevation was 7,000 feet, that's 2,000 feet higher than Denver and the air was uncomfortably thin. It was also very dry there, few bushes or trees and a lot of dust. Every morning people would have to wash their windows, sidewalks and cars to get last nights dust off.
It was quite hilly, less pleasant to stroll than BsAs. But there were nice artist galleries and restaurants.
In the last few years the cartels have gained control over large parts of that country.
The U.S. State Department designates large parts of Mexico as being Level 4 dangerous. It means that those areas are as dangerous as North Korea or Syria!
Many other popular areas in Mexico, like San Miguel, are Level 2 which means you should exercise caution. These ratings don't scream "Move here". And here's something you haven't seen (yet) in Argentina: in the early 1980's Mexico changed it's currency. But foreigners owning property could only sell for the old pesos which were worthless. Mexico basically stole all the expats property.
Ajiic is a lovely town on Lake Chapala. Unfortunately it's in Jalisco State which is designated as Level 3.
I still love Mexico and wish I could live there. Caveat Emptor.