Man these up-to-date information is extremely important and helpful!
Schwab uses a visa debit card and has a 1000 USD a day limit.
So I guess the winner here is Krung Sri, aka the Yellow Bank, and the lowest fee option is to simply withdraw 30000 THB at a time.
Also how do I make sure that the ATM machine has enough cash? I have encountered in Turkey multiple times that the ATM does NOT have enough cash and therefore wasting time and money travelling to that ATM. Most large bank ATMs especially the in-branch ATMs do have enough cash but not the Post Office ATMs, which frequently run out of cash in Antalya Turkey.
So best option is do 30000 at Krung Sri, then 20000 at Aeon, then 20000 at other banks.
Couldn't do Schwab at Bank of China ATM since they don't accept Visa Debit Cards right?