Other accommodation within reach of the convention hotel are:

Hotel Best Benalmádena: http://www.besthotels.es/en/hotel-costa-del-sol/hotel-benalmadena/4

Casinomar Apartments: http://www.apartamentoscasinomar.com/

Vistamar Apartments: https://www.hotelscombined.es/Hotel/Vistamar_Apartamentos_Benalmadena.htm

Flatotel: http://www.flatotelcostadelsol.com/

or try any of the hotel booking sites.