It's a solid package financially.
Villa with 3 bedrooms (shoot for 4 BR somewhere on a nice compound) should run you around 15-20K.
Schooling costs vary -- but what would concern me more than the costs is finding a place for my four kids. Most quality schools here have ginormous waiting lists, and getting 4 spots in the same school will be tough going...unless your employer can guarantee spots for you somewhere.
Explore this situation before you commit to things.