Single Engine IFR operations are not allowed in Europe and they probably won't be for a while. As I am located in Sweden that also includes me. There is a local exemption for cargo in the Swedish regs, but they don't apply to pax. We have a few operators using C206 on floats as well as a C208 on floats, but they are strictly VFR day operations.
Doesn't work with taxi/charter....
115000 EUR/engine may be steep but compared to a PC-12 ?? Really, it sounds like a bargain!