As a digital nomad myself, if you like big city life there are only a few options in latam: cdmx, bogota, Lima, Rio/SP, Santiago. Amongst those I do think BA has the highest overall quality of life on a low budget, esp. if you are making digital usd (tax-free). The air is much cleaner and there's less violent-crime than most on that list; Santiago is much costlier. Also domestic travel is amazing. Food could be better compared to Lima and CDMX. Personally I love all those options for different reasons, but clearly BA is right up there. Banking can be gotten around easily unless you want to buy property or sth really big.
Because of costs of flights/personal tech purchases, as well as the lax overstay policy, makes sense to come here and base up for awhile, bringing your laptop/cell from elsewhere.
If big-city life is not a big draw than there a multitude of options that are probably better for you.