my dependents (my mom and dad) showed separate bank accounts of 500k because of #4. I didn’t ask if my bank account or 500k alone would be sufficient for three person (I assumed it may not).
Given to me by Thai Embassy in Yangon. Each DTV is a separate application. Your spouse do not need a reason, only need to attach a copy of your DTV and proof of marriage (to qualify as “dependent” and fund (another 500k equivalent).