What does the KC value show in LongTailPro? What kind of sites are ranked for the keyword when you do a manual check?
Even if it's a good keyword, you'll need many more.
Let's figure you rank number one for the keyword in Google. You'll statistically get about 33% of all clicks for that keyword. So 33% of 5,400 searches/month = 1782 clicks/month. Which is only about 60 visits per day to your site. To make any worthwhile money you need thousands or tens of thousands of visitors per day. Rank for 100 keywords like that one, and you'll be set. (This is assuming your rpm is lower with less targeted traffic, if you have crazy high conversions you'll need less traffic.)
Note I don't have any actual experience with SEO, I'm still learning myself, but I've been doing some math to figure out what I need to accomplish keyword wise to reach my monthly target.
EDIT: I'm in FL too. It's starting to get hot!