So..the build begins in November and you arrive in February? By the time you arrive there is nothing to oversee on the build unless the builder abandoned the job part way in. Likely you will be disappointed because you can’t oversee a Thailand build from thousands of miles away. That was my experience.
The Myanmar/Thailand border is the Bilauktaung mountain range. I would look there. I live in Suan Pheung, Ratchaburi and the weather is excellent from November through February.