Not so sure I agree with JP, the peso will certainly be devalued, the balloon can not continue for long.
However, I do agree that unless you're young and expect a very simple life, it takes considerable money to live well in Baires and will most probably continue to. Even a few years ago the city was so much cheaper than most places in Europe, the US and Australia that people with modest foreign currency incomes from these places could live pretty well.
That abruptly started to end 3 years ago, got much tougher 2 years ago, and just plain ended this year.
With a middle class foreign currency income you can now live in a just OK apartment, eat out a few times a week at just OK restaurants, join a low end gym....you get the picture. This, of course, is just my opinion.