+ There’s an ATM across the main square (there aren’t many of them).
+ There are buses that on every sharp hour arrive and departure from and to San Martín, the Castelli buses. To pay the ticket you’ll need a rechargeable card that you can buy at Castelli terminal, and in some stores.
+ Igi Llaima, the transport company that travel from and to Chile, closes its office at the terminal at 1 pm on Saturdays, and doesn’t open back until Monday. At least when we went (on March).