$100K is certainly possible for a 560, especially if you are also doing the paperwork stuff. However it really comes down to the individual pilot, if said pilot has the ability (i.e. experience, violation/incident/drug-free, degree) to fly something that usually pays in the six figures (Gulfstreams, & Globals), you need to pay that pilot heavy jet money. Granted this is certainly not the normal situation.
As I like to remind my boss "Sir, I can get you 200 resumes tomorrow, of pilots that will do this job for $30K." His response, "No, just hire the best, aviation is not something you want to go with the low bidder."