1)I think people go to live in different countries because, they love other counties. Maybe they hate own country.Or love travel and see new places. But they can work in other country or made a bussines
2)The big problem its money, live in other country its so expensive! You must kniw other languages and make new friends. And find other school its so hard.
3)No, i wouldnt. I love my country and want live in (название твоего города)