The best way would be as follows :-
1. Travel to USA every 4 months and return with 10 K usd hard cash. ( or come with 10 K for yr first trip here - holiday etc)
2. Find someone who earns in pesos and wants to send usd or C$ back home. take his cash here and send cash to his account there via bank transfer or paypal.
3. If you have a DNI, open a bank account here and transfer funds here.
4. Use ATMS ( but can be v expensive with fees and small withdrawal limits). Best for tourists.
5. Buy Bitcoins online from your bank account there ( back home) and exchange for hard cash here. No limits. Best for tourists.