Coffee CAN EASILY be grown in So. Fla with minimal care. A bit of fertilizer, mulch, water and shade will do it, and with the cooler months we get here, they don't mind the weather at all.
I've been growing coffee for nearly 10 years. Some in semi-shade, others in full sun, all in ground. The ones in the shaded area do best. The trees fruit profusely and stay less than 7' tall, but for harvest they're best kept smaller.
I am a coffee drinker and figured that each producing coffee bush could supply me with ~1 month of coffee, and my plan was to have 12 or 13 to supply me year round, but the labor to make it was just too much so I stopped planting at 8 or 9. They do make nice privacy hedges also.
The "problem" is that making the coffee is very labor intensive without help from machinery / automation and after two seasons making my own, I stopped. Commercial coffee is just too easy :-)
As far as flavor goes, if picked right, cleaned and roasted right home grown is delicious, sorta nutty, but there's that labor thing.
Here's a link to my initial posts on making it, before I threw in the towel that is :-)
http://tropicalfruitforum.com/index.php?topic=13475.msg170671#msg170671