Agents fix it for free amd usually don't pay the 2000 thb fine so take a risk and go there..u can probably get an agent at immigration to sort it quickly for 500
I did learn something useful about DTV visa. It is not recommended for soft power (volunteer,cooking,martial arts,education) by most thai agencies that assist with immigration because the guidelines are very obscure for that particular option. As far as income goes they are very strict. You must show the 500k thb and show a history if where it came from. The application packages are very thick...it's not a super easy visa to get if u r faking any portion of it...
Dowry is nit needed anymore fir older women. Dowry fir young virgin women from excellent family but only stupid foreigner will oay a Dowry. Dowry fir Chinese only..not.for foreigner.