The best moth for you to come there is September, because you have Holiday.
You can visit Buenos Aires. This is Argentina's capital.
I recommend charming village : Purmamarca, Tilcara and Maimara. In Purmamarca one mountain has even seven colours!
Village is tourist and has a lot of souvenirs.
If you want to see whales, orcas, seals and sea elephants visit Peninsula Peninsula Valdez.
You can hire a car, because it's convenient.
I recommend Aconcagua Hotel. You buy only 77 $ for 24 hours.
I wish you nice vacation!