can give u a number of cheap hotel around ibz harbor, u have to call or sms them in spanish the afternoon if in , let me know through pm..check in is in the afternoon after 2.00pm or i can tell a parisian mate that got a flat in san antonio, dont know ifs its already full (can give u his phone number)...Have u try airbnb? u can drop ur luggage close to dunes pdb, kind of 10€ half day...