You can get a UL Master Label without any type of Licensing in lightning protection just by taking a course from UL, and paying their fees to become a UL Listed installer. While being UL listed may be helpful in getting the inspections, many commercial projects require you to be a Lightning Protection Institute certified Master Installer/Designer. This can be obtained through the L.P.I. through some fairly extensive testing. If you want more info on the LPI you can visit Lightning.org.
As someone had mentioned the only buildings in FL that actually require a system are hospitals, nursing homes, and schools. But to get any of those contracts you would definitely need to be LPI certified.
Insurance companies that actually offer a discount for a system are currently few and far between. There are a couple, but from my understanding they don't really offer a big enough discount for this to be a factor in peoples decision to do the install.
The Install itself is not very hard, the main thing is learning all the codes, and being able to design a system that meets code requirements, and is aesthetically pleasing to the customer.
To the OP. I am also in SWFL, so if you have any additional questions feel free to PM me. I am a LPI Master Installer/Designer, and have been installing for 10 years now, so I may be able to help.