In the USA the aircraft is limited to the likes of private owner pilot moving up from a piston single or twin. It has very limited space and it is very difficult and uncomfortable to climb into the two front seats.
Buy a new one and brace yourself for the depreciation once you first fly away after taking delivery. If you were really considering a single engine turbine for CAT you would buy an aircraft built for the job and that had some realistic residual value.
It is hardly used anywhere else in the world where CAT SE IFR has been legal for some time, so why would that change in EASA land ?
If your serious buy a second hand PC12, if your sensible and serious buy an older Kingair.
It is an expensive toy.