@Kent ******
there is no company sponsorship for DTV. YOU can sponsor your SON because they allow an INDIVIDUAL DTV holder to bring a dependent.
Your Mexican girlfriend is NOT your minor dependent.
Thailand doesn't care about your tax headache. Your corporation's money isn't yours unless you take it out as salary, dividends or return of capital.
"Workcation" means you work remotely for a non-Thai employer duh.
So why would Thailand want your girlfriend there being "sponsored" by your company if she actually doesn't have enough funds and a remote job of her own?
This isn't rocket science. Read the requirements. You either meet them or you don't. Looking for loopholes and exceptions will get you nowhere.
If you just want an easy pass buy Thai Privilege