One book you may want to take a look at (if you haven't already) is Carl Hiaasen's Team Rodent: How Disney Devours the World. It's a short work, and it's older (1998), but it deals with many of the issues you are interested in, and it's owned by a number of libraries, including (we hope!) one to which you have access.
A number of Radical Reference librarians have suggested various other possibilities which may be of use.
Your local library may have access to research databases, which are searchable collections of magazine, newspaper, and journal articles. A search for "florida" and "privatization" in EBSCO's MasterFILE Premier and Academic Search Elite, for instance, gets 4 hits. "Florida" and "gentrification" gets 7 hits. Other databases that might be helpful include SocIndex (or Sociological Abstracts at many colleges), Social Sciences Citation Index, Business Source Premier, Factiva, and Lexis Academic.
If you are looking for data, you can find many different government resources at USA.gov's reference shelf. For data specific to Florida, try the Florida Bureau of Economic Research, which has economic analyses and population studies that may be relevant to your research.
Other resources suggested are the Miami Workers Center, which deals with gentrification and fair housing issues and the Data Center, which has internet links designed specifically to search out social justice information divided by topics.
Finally, to find more books, you may want to try searching Google's Book Search for "Florida" and "gentrification OR privatization OR social justice," etc.