Hi Fish and welcome to the forum,
Nice idea but you should check into work
permits, basically the Mexican equivalent of the green card required for immigrants to the US before they can work
here. Most countries want to encourage employment
for their citizens and setting a competing business as a foreigner may be difficult.
Do not know the specific laws of Mexico
but this is the general pattern for most countries. Might work if you can set up the business with a local partner.