I am from Argentina. Let me tell you a secret for the tourist. If you want cheap places ask the local people. but not the people in the hotel or that kind of people, the working people of Bariloche. they know the cheapest places. I'think the Argentinean south is one of the most beautiful places in earth. all the lakes and the mountains are incredible. Some places in Bariloche are expensive for even expensive for me.
Is like Bs As there are a lot of restaurants very expensive but in the other side i know lot of other restaurants that are very very cheap and if is cheap for me is VERY cheap for the tourist (especially European or Yankies). You can eat the best meat, wine, and dessert for 10 dollars (that's what I pay).