I agree with KatharineAnne.But then again I don't have any hard facts to put it against. My boyfriend works for a large domestic company as a chief executive and makes about 8000 pesos a month (some of that is paid as "expenses" as in fuel and insurance for car, car repairs, internet, etc), and his friends call him the rich boy. That allows him to live in a posh apartment in Palermo and to play polo (albeit he gets a good deal for knowing some people, but it's an $$$$ sport), but he is living literally paycheck to paycheck with that kind of expensive lifestyle. I'm not 100% sure on this, but: from what I have deduced his father, in the same company after 30 years and a much higher up position, makes 15,000 pesos a month. On this he is able to support a family of 5 (in combination with his wife's private school teacher's salary I assume), send all his kids to private schools plus one to an expensive private university, change his car often (now a VW Vento, which is expensive here), vacations, etc. They do well. I could be off by a bit but I think that is how it is in this particular family. (I'm sharing so much personal info because I am thinking it will be helpful to others! ah!)
If you can come out here and earn 10,000 pesos (USD 2500ish) I think it would be worth the change. You could have a great time here with lots of great experiences and not be bad off financially. Good luck.
Edit: some posts have come up while I was writing. As for the lawyer or architect, maybe the work isn't full time? I have spoken to a few accountants here and they expect about 1000-1500 pesos a month, which I always assumed was what they received from several clients. Maybe the examples are different... In my bf's company, a new Asistente de Venta makes about 3000 pesos a month plus expenses (lots of time in the street).