[@Claw2k11]

I don't know how well Mexico could weather the great international depression when during the time of the depression the economic growth it experienced (known as the [url=https://en.wikipedia.org/wiki/Mexican_miracle]Mexican Miracle[/url]) was due in part of government policy. And you replaced what'd be an otherwise progressive party with a constitution that'd support what they did with an ultra-conservative monarchy that would go far from that.

EDIT - we're also facing a universe where one of the greatest economies of the time, or the most major political entity in the Americas has dis-unionized. This would no doubt have crippling effects across the board that would worsen the Great Depression. Especially in a nation where many migrant workers from Mexico were still working in at the time to send money back home to feed families.