Schooling options for grade 3

Hi, we have an 8yr old in grade 3 in the Australian school system.
He is diagnosed as within the Autism spectrum but able to cope with the simpler school work.
6 years ago, we cancelled our plans to live in Vn as we felt he needed the facilities of a specific Autism school.
We checked many of the schools in HCM and found that they are ridiculously priced and had no abilities to teach a child that needed specific help and of course the language difference...
We now stay 3 months in each country and have discovered that there are many older experienced teachers who suggest that one on one tuition say 3 part days a week would be sufficient...
We would be happy if our son can read, write, add up and take away, it's not realistic to expect more but he keeps surprising us...
So, we feel that education is not the problem now he is older...
Regards, Mike