How much money can be for nice living here?

It depends on what a beautiful life is for you. You can live from 500 to 700 € a month, but for a decent life you need more than 1,000 € a month.
It also depends, of course, how much savings someone has, whether he has bought / built a house here, is riding a car or just a scooter, wants to travel, or just wants to seat at home.
Plus, there is no social security: if you can’t pay the hospital and medication you will die.