In their odd sense of Thai logic, they probably figure that if you go out of the country, they get another bite of the cherry because you’ll want to come back. They wouldn’t dream that maybe you won’t. Thai logic. Two words that don’t belong together in the same sentence.
I would tread very carefully if I were you. The Thais are notoriously difficult about farangs working in Thailand. A guy was deported a few weeks ago for helping his wife at a street food cart. Check everything out and then double check it all again. Also remember that rules are open to being misapplied where farangs are concerned and the rules can change at the drop of a hat. As far as I am aware, owning 49% of a business doesn’t entitle you to work at it. Only to employ Thai’s to work for you. I may be wrong but I think not. Good luck.