Cash, cards and ATMs
Bring cash, and don't assume the card. We're not going to tell you which business on the lakeside takes what, because we haven't checked them one by one — but the tianguis, the market stalls and the taxis run on cash, and in small places it's worth asking before you order.
If you need an ATM, message us and we'll tell you which one is on your way rather than have you drive down and come back empty-handed. Wherever you use one, prefer a machine inside a bank branch or a large store, and use it in daylight.