There's no doubt in my mind that you're in one of the Toughest positions of anyone I've spoken with in a very long time! Is there any part of Mexico that is of "LESS" interest to the cartels than where you are now? My suggestion/s for you in addition to the Theurgic forms of Magick, become Very proficient in one or more forms of Thaumaturgy. European and/or Latin American forms, US Southern Conjure and Hoodoo, and last but not least as many forms of "Shamanism" as you can wrap your head around! Mix a "Little Theurgy" with a "LOT of Thaumaturgy!!!" You will find that things change for the Better. You may even be surrounded with some unexpected help from the Inner Planes and within Yourself as a "side effect!"
As no doubt you already have been, pay attention to your Gut, find and develop a favorite form of Divination, it's worth a Lot, take it from my Wife and myself. Strive to be a sincere Brother in Ars Magica and many forms of assistance can open for you!

I once had a DM/PM conversation with another member (who shall remain nameless) to the effect of when it comes down to being Magicians, et al, it makes No Difference where you're from or your ethnic heritage, "Deep calls to Deep", the Web of Magic/k is Everywhere! It will become easier to pick them out where ever you are or go as well. Nobody who knows will ever tell you that it will always be easy to keep your chin up though!
So... it looks like you're coming along nicely!