We only had 500,000 Baht in our account for a month. My husband was just approved for the remote work DTV. My suggestion is to have a bit more in the account if it's not going to be a total of 3 months of statements. We had 21,000 USD. Also, a cover letter explaining what kind of work you do and your interest in Thailand as well as a statement saying you will not be working in Thailand and you will comply with all the laws.