Well for starters do you have the required 500k baht in an account? I recently saw someone get approved for treatment through zen clinic I think it was in Pattaya. You could apply for the DTV under that if you have the required money to show.
Im 40 and retired applying for my DTV now. An agent told me apply again after the first 5 years so I came get to the age for the retirement visa. They werent able to provide anything that says that would be possible but also theres nothing saying its not.
any update after the request? I am waiting on my documentation from the Muay Thai gym Ill be attending then will decide if Ill apply from HCMC or Hanoi.