I've been considering La Falda (also Biallet Massé a bit further in the South). How are the seasons? Are the rivers dry in summer? Possible to find old houses for 35/40.000 USD (not in perfect shape but I prefer older constructions, anyway my goal is to build my house).
Another place (not visited yet) in Cordoba is Calamuchita/Villa General Belgrano (South of Cordoba, about 1 hour away). I've heard good things.