Intercity buses in Argentina are very comfortable especially if you book in Cama-Ejec or Cama Suite. And the prices are very good but the distances are pretty great. Have you included the travel times via bus in your schedule? It will take almost a full day to travel to and from Bariloche, about 17 hours to Mendoza, and 9 hours to Cordoba.

Flying is obviously much quicker but unless you are arriving on AA or LAN so you could qualify to purchase a Visit South America Air Pass then you will find the price of tixs very expensive. Here is a link for the pass
http://www.oneworld.com/ow/air-trave...-south-america

As for your time table not certain that you really need 4 to 5 days in Bariloche at that time of year. The ski season is over and the weather will be a bit nippy and possibly wet. If you enjoy wine you might add another day to Mendoza to sample more vineyards .

Sam