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It would be very interesting to know how other "expats" feel about leaving Argentina and how expensive is actually too expensive for them to stay.
I make a very good US salary so I'm still a bit insulated from really feeling the pinch, though I've tightened my belt simply because I can't justify paying for something I know is outrageously over valued.
In terms of packing it up and heading back to the US, the cost of renting and transportation are the big ticket items for me that keep Buenos Aires competitive. Since I don't need a car, that keeps my expenses relatively low. When a city like Chicago starts to look cheaper in comparison, then I'll leave and go chase a job with an even higher salary. Then maybe I'll come back and buy property when the peso tanks again.
(Somewhat joking)