Here, I've made a table of exactly how much each portion of the trip cost me. My trip involved a mix of camping, hotels and staying with friends we met along the way.
The expenses listed include everything I spent, including souvenirs, personal goods and the occasional bus trip, although I tried to mention in the comments anything that might have affected the total cost.
I hope you can find this helpful at least as a guide.
|Portion of Trip
||Cost per day
|Argentine Tierra del Fuego
||Lots of camping, much free
| Southern Chile (Chilean Tierra del Fuego to Puerto Natales)
|| Lots of camping, much free
| Argentine Patagonia (El Calafate to Perito Moreno)
|| Lots of camping, plus we paid for a bus ride
|Carretera Austral (Chile Chico to Puerto Montt)
|| We paid for a few busses here
| Central Argentina (Bariloche to Buenos Aires)
|| We stayed for free in Buenos Aires
|| Because of friends we stayed with, I only paid for accomodation twice in Uruguay. We also took a couple of busses. $10 bucks would be quite unrealistic otherwise.
| Misiones (Argentina)
|| Also includes a day in Foz do Iguacu, Brazil
|| We stayed with a friend in Asuncion, otherwise we stayed in hotels
|| Mostly stayed in hotels
|| This is inflated by all my Christmas shopping (lots of souvenirs). Otherwise, Peru is pretty inexpensive. My figures don't include the Inca Trail (very expensive!).
| Brazil (Manaus to Venezuelan border)
|| Stayed almost exclusively in hotels, includes a 5-day boat trip down Amazon River ($200)
|| Stayed only in hotels