My advise is to forget about teaching unless you have expierence doing so, a TESL certification, and more than $500.00 USD in cash on you when you touch down.
The market for English Teachers is saturated with people like myself who thought they could get a job teaching English just because they speak it. Without the certification AND expierence you'll be hard pressed to get enough hours a week, let alone a month.
I applied for every ad I saw and what many didn't say is that without the expierence or certification my CV was going in the trash.
Now, if you're a woman you might be able to get work as a nanny but that pays even worse than institutes.
I finally was offered a contract that is 9 hours a day, 5 days a week for $33.00 ARS an hour (+/-$3.60 USD). From talking with my friends who are all native Argies with work expierence here, I make the most of us, and only my best friend's boyfriend makes more because he does TV commercials and stuff.
Finally, coming from IT world I'm going to assume you like technology. Prepare to lower your expectations greatly. All 3/4 telecom companies suck (Movistar being the worst) and the service with 3G (when it works) is actually EDGE in America. It's also very expensive to buy electronics unless they're plastered in Blue and Orange Tierra del Fuego stickers, even then a 32" TV for example is 4K ARS.
Finally, there's the inflation part. If your budget is 5K ARS a month when you get here, you'll need to make 6,500 ARS 11-12 months later to have the same standard of living. INDEC (the government stats bureau/bullshit factory) may say 10%, but apartments, businesses, and everyone else knows it is 20%-30% depending on what you're talking about. My rent goes up 20% or 30% in one year from now, whatever we agreed to in the contract because inflation is just that uncontrolled.
P.S. Don't let this scare you. I'm not saying don't come, I'm just saying be realistic and realize much of what you read about Arge is grossly outdated. One of the few places on Earth where a 2013 Ford will cost more in 2014...