How much to retire in Taipei for family of 4

Hi, would like to tap on the wisdom of the internet crowd to help me figure out.. how much I’m gonna need to possibly retire in TP

Background:
Current age 38
Planning to have kids
International school is a maybe but not necessarily
Rent will probably be a 3 bedroom down the road (I think buying is a little out of the picture now)

It will probably be 2 pax for 1-2 years
Then kid1 within 2 years, and another preferably 1-2 years after (or just 1 is fine in this economy)

Not Taiwanese and will figure ways to stay if I love it (going for gold card first)