Here is a link to a Calculated Risk post on vacant condos in South Florida. One 32-story high rise condo in Fort Meyers has only one owner living in the building. The lone owner is fighting the condo developer The Related Group to get out of his condo. Good luck with that. Condo developments that only sell portion of their units are a mess because the whole complex is then subject to the condo association, which makes conversion to an apartment rental property difficult.