I lived in Belgrade for a month in Summer 2016. You're right it was pretty cheap, but I still think $1000 would be cutting it close. I think I spent $600 on an

I lived in Belgrade for a month in Summer 2016. You're right it was pretty cheap, but I still think $1000 would be cutting it close. I think I spent $600 on an Airbnb for a month, and probably close to $400 going out / on food etc. But yeah... Belgrade is really cheap if you want to live affordably. I bought a steak for $3! The important thing to note is that for a foreigner it will definitely be more expensive. You're likely on a short-term lease, you need to travel home periodically, you don't know anyone in the country to get roommates, etc.