I'm turning 30 in February, and I want to take a ~3-week-long trip through the Southern Cone in January with a friend. Our plans currently include Chile-Argentina-Uruguay, but I'm more than happy to change my mind.

Has anyone done such a trip there? Should we include Paraguay and/or Brasil? We're willing to get on flights, rent a car, take a boat, whatever. We're both from Budapest, with limited knowledge of Spanish and zero knowledge of Portuguese.

Any help would be appreciated, if anyone could post his/her own itinerary, I would love him/her forever. Thanks in advance!