YES we know. It is a MULTIPLE entry visa. 180 days per entry. As many entries as you want in that 5 year period. Otherwise it would be a Single entry visa - which it isn’t.
Similar here. I will write a letter confirming my employment as MD (in my own company), while also mentioning the official court registration number of the company.
Officially 10k THB. But expect to pay slightly more at your Thai conculate. They are sometimes adding quite some premium with the money "conversion" rates.
I believe details like this will be left with the according Thai consulate at your location. Unlike with the LTR visa, the DTV does not seem to follow a centralized (pre-) approbal process. So maybe wait and see for details to be published by your consulate.