How much does it cost to travel around South America?

travel
Welham S asked:
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I’m considering traveling around S. America for around 6 months to a year and wondered how much it would roughly cost. I would be back packing and am not expecting to sleep anywhere fancy or travel in luxery but I would like to hit some major cities for nights out as well as traveling to more remote places. Also if anyone knows the anyway to pick up casual work there to earn whilst I’m traveling that would be much appreciated. I don’t speak much Spanish at the moment but fully intend on learning.