To be crushingly realistic -- with no work experience it's going to be very tough to find a company at home to take you on and then say to you "Great, go head up our Argentine business". Entry level workers don't get the international transfers.
Best ideas are 1) Stay at home for a few more years and get some solid business experience with a company that has offices here. 2) Try to go independent, if you have any web experience you may be able to eke out a living via online bidding on jobs (elancer.com, rentacoder.com etc) 3) Suck it up and do the english teaching 4) Come down here and sell condos to foreigners and eke out a living on Argentine wages.
Argentina is a tough job market. Without work experience and as a foreigner you're really setting yourself up for a difficult situation. If you found a job with an international company, take 3-4 years with them, and then maybe you can get a transfer.
Another option that may work better for you and perhaps be more fulfilling would be to try and find NGOs doing work in Argentina and get a contract with one of them -- I suspect much of that work would be up north though, not BA. Try Red Cross, Oxfam, any of the myriad of UN organisations, children's charities, maybe look on the WHO to see if their doing anything, contact HelpArgentina etc etc Wages may be low (there's no danger pay in Argentina
) but could be fulfilling.