'Kiyohime' seems to do well in Florida zome 9A or so. I don't have one but a club member has one and some other japanese maple, all do well. Need morning sun and shade for the rest of the day. I think they grow under 50% shade cloth.
Leaf scortch would be the issue as far as I can tell. The shade (either natural from tree canopy or cloth) would be a help. Not sure about the humidity.
Here is a link to the cultivar.
Best of luck!