If you can reliably convert USD to ARS then this can work, but you would not want to keep your money in ARS. The inflation rate has been killer for a while now. You will also need to use the black market for good exchange rates, the official ones aren't really that good, which could become a challenge depending on where you choose to live.

Across the border in Uruguay would be a better bet with a somewhat more stable economy but still benefiting someone with USD. Or go to a country like Belize where you can use the USD without needing to convert to local currency, but still can have more purchasing power in the US.