I'm in Buenos Aires till 24 of January and after that I'll go to El Calafate for a week (or so) planning to rent a car and do roadtrips in the region. 

Then I want to visit Rosario, potentiallu spend more time in BA, then hit it to Brazil. I want to see the capital and Rio (at least)

I'm quite shit at planning so I'm keeping it flexible, no dates yet.