Excellent move!
Moving your home and your family to Philippines will give you peace of mind in many ways !
If your kids speak only english they will need an english medium school. There will probably still be tagalog subject but you all just better grin and bear it, then no worries.
No need to confine your search to Manila.
There are scheduled airlines that fly out of Clark (DMIA) to various Asian cities.Cost of living and air pollution in the right place reasonably close to Clark would be less than that in Manila.
