I worked on Apples new data center in Denmark last year, they had problems with water ingress from the 375 meter felted valleys between the massive roof sections, i suspect with Thailands torrential downpours similar problems will occur.
The cooling systems for these data centers is also on a scale hard to comprehend, they generate so much heat that the hot water was going to be piped to the nearest town. With the ambient temps being so high in Thailand, that may also cause some issues.
The power requirements to run a data center are also astonishing.
From the diggers moving in to completion, i would guess 5 plus years if on the scale of Apples center.