and if you make the slightest mistake in your online application (photo background not white, spelling mistake, typo) they will cancel it and you'll have to pay 10k baht again. Happened to a few people now
I actually wanted to experience Korea so it was a byproduct. I didn't go there specifically to do DTV 🙂 I've even booked a Laos appointment in case I had trouble with Korean embassy
I've got DTV and already arrived and got stamped for 6 months. I did it online at section called DTV and I probably wouldn't have to send them all those documents for just a tourist visa. You can email embassy yourself like I did.