but to answer your question, I don't think you have anything to worry about, especially if you don't sell the art in Thailand. If you do want to sell it here, you could give it to a Thai person or gallery to sell and raise the money. You'd have to trust them implicitly of course. Some people will tell you that according to the letter of the law you can't do anything productive that would take a job from a Thai. And yet foreigners do all sorts of creative things here without consequence. I wouldn't worry at all