Hard Thai gym choices

[Mongoosemk12]

I am planning on going back to Thailand in October for approx 3-6 months. Because I won't be there longer than that, I have been considering a few different options. I am torn between bouncing between gyms (potentially in BKK, Chiang Mai, and maybe Hua Hin) about once a month or just picking one a gym in BKK/Chiang Mai and sticking it out. Where it gets a little bit more difficult is that I also know a trainer in BKK from my old gym who now has his own place which he just opened. He is the only trainer there and I am thinking I might be able to get all one on one sessions with him for a really good price (plus I would like to help him out).

What do you guys think? Bounce between gyms, pick a gym, or try and swing a deal for private sessions?

I'm prob beginner/intermediate level and have a few gyms in mind to train at (MTM Academy, Attachai, Santai, Hongthong, Sitmonchai, Namsaknoi, and Sitjaopho in no particular order). Anyone with recent experience anywhere they loved?