Hi kimchi123,

not a bad deal I'd say, just depends on what exactly you are trying to achieve - knockout the South America requirement with this trip or you also want to visit Athens on the way back for example, killing two birds at same time?
I see you are using Google Flights multi-city search. Are you familiar with playing around with the "Explore" function of GF? If you are, ignore the below (still posting it, in case others aren't familiar).
See the screenshot for an idea if you aren't familiar with this great search function - I used same date as you, same starting airport VIE
You can see the "Explore" function provides a few other travel ideas like NYC & Chicago for a similar price as your flight.

Make sure to set "Turkish Airlines" as the only airline before going to the Explore page, you can then play around with different starting airports, which are easy to reach from your home or easy to position to from your home (in your case maybe PRG/MUC/BUD etc.)
Then use different regions to find the best airports to fly to for maximum earning effect / best price etc.

Hope this explanation can help you look for (more) creative routings!