Taxi from San An town varys between €5-6*. The bus stops on the main road just out side the hotel - €1 I think. The ferry €3 but it finishes at midnight or earlier.
*I find at asking a taxi driver at the rank in town, in spainsh, how much it is to the riveria useally gives the reply of €5. Just jumping it is costs €6.
I'll be there in Sept.
PS The bar across the road on the corner (Bar Saratoga) does cheap San Miguel & Sergents Peppers II is very noisy until late into the night.