Again, I'd say high end restaurants are much cheaper in BA. So if you're used to spending $200 per couple for a nice meal with wine in NY, Chicago, London or SF, you can do it for about half in BA. If you're spending $5mm plus for a nice house in these cities, you can buy the same for a fraction.
But booksellers saying not to worry about inflation are seriously out to lunch. There are fthe places in the world with inflation anywhere close to Argentina's! Not anywhere close!
I agree with LAtoBA, if you're trying to live a good, upper middle class life on a modest income, give this serious consideration. This used to be easy in BA but that's no longer true.
I don't think anyone disputes that living in BA can be a great adventure, but the OP appears to be asking if he can live well on a modest income. And what some of us are saying is maybe,
but it depends on what he means by live well. A few years ago on $2700 he could have had a great apartment and eaten every meal out. No more!
As LAtoBA says, $10US drinks are the norm in good bars, $50US per person is normal in good restaurants, good clothes are more than in the states........BA used to be cheap and people need to know this has changed. If that still works for them they should come, we did, but with eyes wide open about today's costs.