Playa D'en Bossa
Pinto,
I actually stayed at the Fiesta Hotel on Playa D'en Bossa last year. Its very affordable and a convenient location (directly across from Space, 5 min. taxi to Ibiza town or san Salinas, as well as a 1 min beach walk to Bora-Bora). The rooms are simple, but the staff was friendly and the service was good. Also, they have a half-board deal which let's you eat 2 of your meals per day at the hotel's restaurants. For a little extra they have an all inclusive package. I only had the half-board, which saved money on food, as well as made eating extremely convenient.
The beach itself is great. Great quality people and girls, and not as trashy as San. An. Several on-beach bars and restaurants that are walkable, as well as being very close to Bora-Bora. Alot of space to lay out, as well as a number of young people.
Also, easy taxi ride to San An which is very inexpensive... Any other questions, PM me and I'll be happy to Answer.