I decided to study in the US in the end. However, I lived in Thailand for two years. So I researched a lot, sent emails to few employers to get their perspective, and talked to couple friends who work in Human Resources.
if the specialization aligns with your niche, probably good idea to get the MBA as long as the program (not just university) is accredited by a professional organization. This would be beneficial with/without a job in Thailand. Getting a management level position in a reputable company here is all about networking, and in my own personal research, MBA alone without a preset trajectory is not worth it.
Im contemplated getting my own MBA few years ago, but soon found that MBA is over saturated. WITHOUT !!!! (emphasis here) a preset niche/pathway, some employers even consider it as a safety net or even an escape path for college graduates unable to secure a job. A specialized Masters degree is much worth it, compared to a general MBA.