You need to heir a lawyer then u should have 3 thai partners for opening the company nature of business and most important 4 thai employees in the company against yourself foreign nationality work permit need to be applied
Try kasikaron branch in a some mall with this amount I hope u will be able to get through this red tape.I did it with only my Non B Visa and company docs.
Mint KW I have the same visa but was not questioned about anything you dont need to worry we submit all docs to the embassy well in advance and once its issued no issues, did embassy mentioned anything on visa mine has a hand written statement about my position in my company..