1996 hiace 1 kz timing belt question

Hey everyone!

I have a 96 Hiace 1KZ with 210k km. The timing belt was replaced around 100k and my question is, how crucial is it to get it done again? Can I wait a 1-2 k km or is that like russian roulette....

of course my mechanic recommends we do it, but at 190$ hr for labor in Portland OR it is gonna be very expensive!

so yea just want to know your thoughts. please and thank you