I'm fully aware of current prices for housing in Brussels as I help people daily to move and 2k for an apartment is top end prices. As Santireyes79 has found out, you can pay an awful lot less.
40% of children at our children's French school do not speak French at home, many of whom did not start in French but moved here. Almost 10% of the school population speak English, the majority can read and write in English, despite being educated in French. Many come, many go, they return to English or Spanish or German etc, there is no obligation to continue in French abroad. In any case, it is completely untrue that you cannot continue in French around the world, 480 French schools in 130 countries in the world, at low cost, even lower cost if you have French nationality. http://www.aefe.fr/tous-publics/le-rese … ayonnement
I pay under 100 euro a year for contributions to the mutuelle which covers me and 4 children. I pay 5 euro out of my pocket to visit the GP.