Condominium living in South Florida runs from boutique buildings of a dozen residences to full-service towers with valet, a doorman and resort amenities. Most of what buyers want sits along the Intracoastal or directly on the sand, where a high floor buys both the view and the breeze. Ownership is lighter than a house: the building handles the roof, the landscaping and the insurance, and you decide how much time to spend in it.