Condominium associations have plenty of trouble these days, with defaults, shaky finances and empty units. Picking the right property manager can address some problems and avoid many others. Ken Lassiter, board treasurer and president of the Pipers Glen Estates homeowner association in Boynton Beach, said a good manager can cut costs and help a community run better, while a bad one can rack up bills and waste time. Pipers Glen has had about a half-dozen managers in the last 10 years. While associations aren’t required to have professional managers, it’s generally a better course to hire a licensed company than taking on the work themselves.