So why do you think everyone on a DTV are big spenders? A 5 year "tourist visa" based on for example cooking classes or Muay Thai lessons, is imo just a joke.
I wish you would understand that the witness requirement is probably the most stupid thing I've heard in many many years, and I've been around a while. Fyi, Trat is just one province out of 77.
I repeat, this is NOT how it works in most immigration offices and I have never heard about it. I have been around many years. Imo,Trat is out in the sticks.