If you are interested in teaching, you could look into business English schools based in
Mexico City that service the Santa Fe area of
Mexico City. Before you say 'but I'm in Metepec!' know that Santa Fe (as well as Lerma) is closer to Metepec than it is to most of
Mexico City, and the area is a major corporate hub for the region. There are plenty of opportunities to teach English at a variety of companies there.