I agree that now maybe a good time to get into craft brewing in Central America, but it is not like doing business in the USA. If you want to give it a try then go for it, but be careful. And of course, never invest more in any business venture than you can comfortably afford to lose (regardless of the venue). Because odds are good that you will lose it. Regardless of whether in the USA or Mexico -- start-ups are high risk.
For example, as the middle class and the foreign resident population expands here in Guatemala, there is a growing interest in better brews. A few bars are just starting to carry limited quantities of imported craft brews.
A couple of ideas: why not brew under contract and not risk the capital investment in brewing equipment & supplies? Retail location: I suggest targeting a venue that has a combination of affluent locals, tourists, foreign resident's...etc. These are the people that will pay more for your better brew. I would not worry so much about the price -- they will pay for interesting beers -- don't try to price compete with the local mass produced brews (you cannot) -- go for the the up scale market and set the price accordingly. And, of course, brew a really good beer or they will drop you like a hot rock --- few things more disappointing then to pay top dollar for a supposedly good beer and it turn out to be lame.
For example, I spent part of last year in Bocas del Torro, Panama. It's demographic includes most of the above. And, as a result, there is a pleasantly surprising range of beer available there. I even found Chimay Trappist Ale!