Just for reference I am a primary teacher at an international school here in Singapore. I make 80 K a year, 2.5 K monthly housing allowance, flight every other year, if I had kids their school fees would be covered (up to two). I am single and save over half my salary every month and take medium expensive vacations every few months.
If you are getting additional benefits on top of the 90 K salary you'll be fine. If only the 90 K you'd struggle hugely.
I think the equation would have looked different if you had to pay for school.