Um Ken, whoever told you there are no snakes? Well........ all I can say to that is This is FL, there is nowhere in FL that doesn't have snakes! They may not have seen any but I guarantee they are there.
Bearded irises will not grow where you are --- not cold enough in winter. Stick with the ones Lin named for you. Those will do well. I think the Louisiana irises might do for you too. Those are the ones Scott posted -- they come in blue too, but you may actually be too far south for those. Wouldn't hurt to try them though.
Coconut trees..... other than being beautiful or eating the fruit or using the shells? That's the beauty of them. As long as humans & animals, cars & roofs & greenhouses aren't beneath them when the nuts fall then you're good to go.
I am a strong believer in the simple fact is that what matters in this life is how we treat others. I think that's what living is all about. Not what I've done in my life but how I've treated others. ~~ Sharon Brown