I heard from the Cab driver that took us around that average Salary for family of 4 in Belgium was about 25,000 Euros....which I belive is use perhaps 30-40 K..... It is expensive but cheaper than Londan or other western european cities.... Good luck...my suggestion is if you need a job....it will be hard to find... 18% unemployment in Belgium....lots of state funding for belegiumites..