Your husband could try and get a job in Europe. Here in flanders there's quite a lot of walkability. They are creating bike lanes. I'm lucky that I can bike to work 15 km without interacting much with cars.

I could suggest Indonesia, for 100k euros you have a nice apartment with access to a gym and swimming pool. But I don't know about the needs of your child. They don't really speak English there either, but Bahasa is pretty easy to learn.

Personally I'd go to Batam, Indonesia. Right under Singapore. Live in the center.

For walkability it's bad there kinda. And hot. Be careful of things like construction work. Can't really know if it's all safe.