Be careful he may be Special forces and can kill you with a pencil. He is no building expert however.
Abandoned buildings get re-started after more than a decade regularly. In Bangkok, this one started life in 2003 as a Crowne Plazza and was abandoned in 2008.
https://property.bangkokpost.com/news/1264942/unfinished-old-hotel-on-sukhumvit-27-sold
It was purchased for 2.5 Billion Baht in 2017 and is currently under construction again in 2018 to be completed in 2019 as a Careton Hotel.