It probably depends how much you can bring to the business and how many other people the owner needs to hire to run it.
Can you also fill the roles of HOTAC, HAAMC, marketing manager, HR manager, peace negotiator, detective, IT manager, and do it all on call 24/7? If yes, you will be in a strong negotiating position to get a bit more.
Just remember that times in GA aren't great for anyone and unless your 4-5 SE aircraft are all flying every day, you and your underlings are lucky to be employed - going hard at your boss and demanding heaps of cash will not necessarily help the stress levels in the camp.
On the other hand if it's a rip-roaring show and you have 8 pilots flying your 5 aircraft 7 days/week, yes a good Chief Pilot can probably ask for $90-100k.
Good luck and remember that if you are given the job as CP your boss may be putting his entire livelihood in your hands.
