well the credit union I am with charges $25 for a wire transfer. Everything else is an unknown. That’s why I asked? I have asked KBank but they won’t give me a definitive answer on a hypothetical $5k transfer. With Wise it’s $37.47 and you get ~161k THB
the BOI even offers a service for you to go through them to open an account at Bangkok Bank. I recommend you reach out to them if you are having problems. Or show KBank the BOI website