The only concern with growing the South African species in Florida might be the lack of a sufficient night time drop in temperature which most of these species enjoy and some require. Please report your success or failure, the data is always useful to others. Some of our friends in Singapore have reported difficulties with species which many of us consider "easy" species, like Drosera capensis. I say go for it, at worst you are out a few bucks for the plant. It's growers like you that can shed some light on what is and what is not possible in conditions that approach tropical.