Being the organised nerd that I am, everyday we were travelling through South America I was tracking what we were spending. Before we left I found it pretty hard to find any information on how much South America will cost you, so hopefully the below can help someone else in their pre trip planning.
Bare in mind the accommodation element is very subjective depending on who you are. By no means did Lily and I skimp in this area. Where possible we stayed in the best hostels and about 50% of the time we were in private rooms. So if you are needing to get this cost down this could be where you do it.
We also flew quite a bit but as you can see this is sometimes pretty cheap so look into this as an option if you can plan ahead. New years and getting to Rio was an expensive part of our trip in terms of flights but 100% worth it.
Below I have also summarised our average daily spend in each country we visited. Note that this does not include accommodation or flights. Just food, alcohol and general travel costs. I hope you find this helpful.