Well I have switched PC12 for Cessna Citation. Now I see what does it mean warranty or customer service. With PC12 warranty covers only spare parts, so you pay like crazy for labor to solve all the production issues. Yes, they will pay for 10USD part that was replaced, but be sure you will pay 30.000 USD a year for maintenance just to found out what is wrong. With Cessna, the warranty covers also labor.
And as for singe vs. twin issue. Yes the probability of engine failure in PC12 is small, but unless the pilot is completelly stupid, the bug WHAT I WILL DO IF DONKEY QUITS RIGHT NOW, is digging in the head all the flight. Especially during night, heavy IMC, over mountains, and so on.