A lot of hospitals will list their prices on website or you can get an answer pretty quickly if you text their Line account. I think BKK Pattaya was around 10k for a full physical last year (might have been a special)
It's pretty ridiculous how everyone is just saying to search. You know what I found when I searched? Just heaps of threads of people telling people to search lmao
Hey since no one is answering your question, it's currently very difficult to get a bank account for DTV holders, even through an agent. I recently asked a bunch of agents and no one can help.
Just be aware that when you do chargbacks against a company like Google they close your accounts. Not sure what the consequences of doing that to a country you might want to visit again in the future may be