Are you aware that to instruct fixed wing/aeroplanes in Argentina, you need 500hrs total or post-PPL? Also, to get copilot job in an airline, you need 'comercial de primera clase' - 900hrs TT with some checkride similar to CPL checkride?
Any GA jobs in Argentina are in demand by local pilots, although once you get to the level of eligible to instruct, you can find FI job reasonably easily, as Argentina's schools are used by Latinos from countries around a lot, too, due to cost, availability, etc.