Exchange Currency

I have never used a bank machine in Mexico. If I was long enough in Zihua like yourself, I would have a local account but for a few weeks, not worth it and I exchange CDN$ at banks and my exchange rate has always been as good if not better than through an ATM as my banks would charge me for such a transaction and the local bank as well. There are at least 2 banks that convert CDN$ to pesos in Zihua and the exchange rate at the moment is excellent. I am Canadian so it may be different for Americans. As for exchanging euros, I would check with Intercam as they seem to exchange everything. Their exchange rate is lower but not bad.