I think you are answering your own question. When you're property is confiscated and you have no legal standing to recover it back. You might have to rely on somebody's legal interpretation for something that is not well defined. Not being a citizen, I'm not sure you will have the same legal footing. That's a lot of money in Thailand, I'm sure somebody would love to break your balls. Is it worth it. Think of your risk versus reward. I say keep your business state side or sell your business. A lot of trouble and risk.
a friendly word of advice, be safe don't do that. Not worth dying over. Had a colleague that was stabbed to death over a few baht he thought taxi was trying to waste time in traffic. If taxi driver says no meter, just decline and walk away. You have a choice, just walk away. I guess taxi man says I'm not going to drive a half hour for 250 baht in meter fare. Don't argue with Thai over a few baht.