I got this info from a mate that was employed by them.
"They do all of their type ratings/ipc/atpl flight tests etc in an actual aircraft, no legal requirement for a sim as it's only a 19 seater. Expect to work max flight and duty if employed with a salary based on 38 hour weeks but generally you're working the limits of the regs for award pay. FO around 55K and Capt approx 79K"
That is likely where the excessive cost is coming from.