Most people say not to purchase in FL as its a location that is very easy to gain access to, through trading, as well as "extra vacations" offered through the trading company through reduced prices that do not require you to trade your desired week.
Most suggest purchase in an under developed TS location, and use that for trading, your FL trades may not get you much.
Now, I say that, but I own 2 resorts in FL (Sheraton Vistana and Wyndam) if I could do it over again, I would have purchased somewhere different.
Also, if you would like to stay at a Disney Resort, you want to purchase at a resort outside of FL and that trades well with II. That way you don't have to spend as much $$ on DVC points.