I think that's a niche you could fill. Maybe take a vacation first for at least a couple of weeks. The problem with a lot of expats here is that they live like tourists. Telling people they need at least $2500 a month to live. That is so not true. Locals live off $300 a month, if that. One could live off $500 - $700 if they live like the locals. That's actually a comfortable amount, especially if you're not into the bar scenes. Good luck to you and your husband.
I don't think your music therapy or bus driver experience will help you in Thailand BUT your holistic therapy experience could be something you can use. Thailand attracts that kind of clientele.