If you are planning to move to Thailand with school age children, understand the high cost of international school tuition per child.
ISB, which is one of the better International Schools in Bangkok, has published their 2025 tuition fees.

For a high school student 1,162,000 baht equals US $35,000 per year (and this does NOT include all the activity fees and other costs)
You might be able to find other international schools around Thailand in the US$17,000+ range?
If you want the benefit of a western education for your kids, it is going to cost dearly.
Many parents are forced down the homeschool route as they simply cannot afford these high tuitions.
Please do your own research if you plan on moving to Thailand with school age children.
Narrow down your location and find out which schools are viable options (If there are any?)