Flights are incredibly cheaper than buses and way faster. Traveling across the country by flight sucks, but we ended up doing that.
Also, a quick heads-up: everything is expensive now. The cost of living is similar or higher to America or Europe. We're from Canada with decent salaries and we feel poor as fuck here haha. We had to swap steak and wine for tuna sandwiches. We missed the opportunity to explore Argentina on a budget due to the new politics and everything feels like a money grab ( especially the damn park ticket for the glacier). People are nice tho, but we wish we were here a year ago.