I heard that about the wire, too (poop just sticks to it). Make sure you take a look at the open coops - you don't really need a closed, traditional one for Central Florida. Mine is more of a big run with a roosting area that is half-enclosed, and some nesting boxes. More like a giant bird cage. I have dirt floor and pine shavings, and in the roost area I have three vinyl tile pieces (long ones) that I pull out and rinse off. If we get a heavy rain I do have clear vinyl 'windows' I can hang on the sides to keep it dry in the roost, too. Very easy upkeep, and it stays nice an cool. They love to dust bathe in the dirt, so I would never put in anything to interfere with that. Will they have access to the run all day?
Sand is good, too - mine have taken over my son's sand box when the free range. They all get in and dig themselves cool, cozy holes. It's pretty funny.