Actually, more like "shell assembled in 6 days". To build it they needed to first prepare the foundation which can take several weeks prior just to get it soli

Actually, more like "shell assembled in 6 days". To build it they needed to first prepare the foundation which can take several weeks prior just to get it solid and firm enough to support such a structure. While that is happening they need to be crafting the panels and components in a factory. Then they can bring it to the site and start assembling. With enough labour on site it can be done. Pre-fab is far more advanced in Asia than here and in places like Japan a house can be assembled and ready to move in within 3 days (fully finished). Toyota builds AWESOME steel frame homes that are earthquake resistant and insulated for sound and energy efficiency. Still, the land has to be prepped first and that takes the most time (no good to have an earthquake proof structure on a poor/soft/shifting foundation). Now... what we need to see is what that hotel looks like in 5/10/15 years (doubtful it was built for a lifespan beyond 25 years as most prefabs are built with short life expectancy and planned replacement).