Mexico, where in mexico to start investing in realstate

[Fawaz Sabha]

I am in Mexico city now for 3 months as we relocated from houston. Looking to invest in the realstate market. Been researching for long time before the move. Mexico City, Tulum, Merida and Puerto Vallarta are in my list however I do not know which one would be the best to: 

Buy and flip, buy and rent or buy and Arnb? 

What price market should I stay under knowing that Mexico City and Puerto Vallarta are the highest market now? 

Finaly, what areas in the best city should I look in. 

thank you for your inputs.