Also realize that if someone says "very windy" in florida, they usually mean that it's very windy compared to usual. a "good" day is about 14-15 knots, this is what it usually is. some days it gets "very good", IE about 20 knots. 25-30 knots is kind of rare.
at 140 lbs, in the last 2 years i've wished i had a 7m maybe 3 or 4 times total. I don't own one.
if your only kite was a 14 or 15m, you could ride 90%+ of the windy days