To be direct, I want to answer the question first and then explain later. I would personally say NO to the question and so do most of you. Here come the reasons.

To tell you the truth if you are a starter, I would recommend you to train with any real Muay Thai teachers. Someone that has learned and know Muay Thai well and is able to pass on the knowledge will do just fine. My first Muay Thai teacher was my friend actually. He taught me some basic moves and helped me correcting it. And I really liked him as my Kru Muay.
However, if things get more serious, you might want to look for a more professional Muay thai teacher. Which I’m pretty sure they are almost everywhere in the world now. They can give you good lessons and instructions of Muay Thai. Many of them have spent lots of time learning from respected Kru Muay in Thailand for a certain amount of time and they are confident enough to help you out.

Don’t think that a lot of great muay thai teachers are in Thailand. I don’t think that’s true. Good teachers are someone who can communicate best with you. Whoever has all the knowledge but is able to pass it on to someone else correctly is not a good teacher. It’s true that different teachers have different methods of teaching. You just have to choose which method work best for you to improve.

One more thing about Thailand is that the country is not so good at keeping best people inside. A lot of respected Muay Thai teachers now work outside the countries because they have a better life there. So who know, you might already have known some of them in your hometown. Knowing this, why bother coming to Thailand?

Unless you want a taste of being trained in Thailand. Just for an experience. I would recommend you take a short course in some private thai boxing school somewhere in Thailand. Like a month or a few months. That will be a very good life experience that you can go back and tell you friends about for the rest of your life. Just a warning though, the boxing course you take in Thailand might not be with a Kru Muay who is better than the one you already have in your country.

But anyway, just enjoy what you’re doing. If you have the money and time, go for it. Thailand is such a great place to spend time in. If you’re interested in taking some courses in Thailand, maybe I can recommend you to some Muay thai gyms I know outside Bangkok. There are some good places in Phuket which will be best for your vacation. Just let me know.