I agree, you need to see what they have at Selby. They may even be able to give you some advice based on their growing. I've lived all over Florida, from Gainesville, to Miami, to the Port Charlotte area. At the time I wasn't a big paph grower, so I can't comment too much about my experiences there, but I can tell you that water quality may be a serious issue it you use normal tap water. Ground water sources are particularly bad since most are filled to the gills with dissolved minerals, and if it is softened with salt, well, you get the picture. Those long, dry winters are particularly bad since you don't even get flushing of the growing medium from rain. Most Paphs, and especially Phrags, won't like all those minerals.
BTW, I did successfully grow very nice specimens of Paph. philippinense and Phrag. schlimii, plus a few complex hybrids ("bulldogs"), back in the 80s and 90s. So, it certainly can be done! Good luck.