Mr. Katz is the chief executive and principal owner of Sherwood Equities Inc., which has developed and manages more than $3 billion in commercial real estate.
Adam Levy lives in a 10-story building that he converted into seven spacious floor-through apartments, including his own duplex penthouse that he finally completed last fall.
Backers said Northwest Florida Beaches International would bring new businesses and residents to the Florida Panhandle; critics said it would also bring environmental problems.