If you have six children
your goose is cooked.. pretty much you need to be in a city with excellent schools , that doesn't came cheap ..
Some one may know if $400 per month is adequate, maybe you must look at bilingual schools, that have international programs valid for US Colleges. etc. You are looking then at a handful of large cities. May consider Lincoln high
Conozca porque Lincoln International School es elegido por la comunidad internacional para formar a las futuras generacions.
www.lincoln.edu.ar