Haha....yeah it would be Part 91 for an individual down there, not a flight department.91 or 135?
NBAA 2009 Jet III (20-45k lb) Copilot Base Salary
25% : $54,000
With the reputation south Florida has for shady operators, I'd expect most offers for pure SIC to be near the 10-25% range...though I have no personal experience or intel.
Best of luck!