Thank you all guys for help. Useful as always!

Thanks. It makes sense. I think this solution could be the best one :)

Sounds good, thanks.

OK, understand. Thanks. So other question - can I put this money on someone else's account in Thailand (my wife) or it should be my account? I am not in Thailand now and didn't open account yet.

Sure, I understand, but I have this money, just not in Thailand, because there is no need to keep it here. I use Revolut account with Thai baht currency, so I can pay in Thailand everywhere by card or withdraw money from every ATM. Just make no sense to send 400.00thb to show I have money, because I will loose based on exchange rate and keeping money here which cannot work (like a frozen). So no other solutions?

Thanks for the response. My embassy doesn't provide document like that. My company is not in Thailand too, so I am wondering how to manage this issue without sending money to Thailand.

Thank you all for quick reponses!

Based on above, I think the best choice could be Savannakhet. Actually everywhere when I don't need to have THB on Thai account, because it's easier for me, if I already have this money.

How long does it take to get passport back, after applying?

Thanks!

Ohh, I didn't know. So it's easier to apply abroad, if I have already money on my private account. Is there any more requirements for this kind of visa applying abroad? Or the rest is the same like during applying inside Thailand?