I'm afraid you underestimate rent costs. In smaller cities you may still find something nice for ~900 usd per month, in more popular places like Krakow, Prague ~1500 usd is more realistic but still optimistic.
This feels incredibly out of touch with reality. Since you mentioned Prague, the average salary in the Czech Republic is roughly $20k per year, and that's the average, plenty of people take home considerably less. You're saying $80k is not enough for more than a year, how do you think all those people manage to get by?
1500 usd for Prague with bills included. Rent in Prague in a very good location is about 1000 eur. The bills can be about 400. For 1500 usd as rent you're looking at some very fancy places.