Approval from the Hanoi embassy in less than 24 hours!
I applied for DTV via the Muay Thai route on Wednesday, while technically still in Thailand (at the airport, after immigration with an exit stamp in my passport). I provided:
* statements (SG bank account, 1 month)
* passport copy
* conformation letter from Muay Thai gym
* hotel booking in Ha Noi
By the time I landed, I received additional document requirements:
* a new copy of bank statements (poor quality the first round)
* passport copy of confirmation letter signatory
* entry stamp to Vietnam
* business registration of Muay Thai gym
I provided the docs immediately. The following morning (Thursday) I received an additional email requesting:
* work permit of the person who signed the confirmation letter (non-Thai individual).
5 hours later I received an approval email. Total time - 22 hours. Total cost - 33k THB (gym package), 10k THB (visa cost), costs related to travelling to Vietnam.