Hostels and Budget Hotels:
The Hostels Guide with BootsnAll is an excellent internet resource for all the budget accomodation available in Argentina.

Featured Buenos Aires Hostels:
Milhouse:
Hipolito Yrigoyen 959 (Centro).
The bigest and more complete hostel in BA. They offer great trips, tango classes, tours, and much more from $ 6 per person with breakfast included.
Contact: 4345-9604 / Website

Flores del Sol:
Flores del Sol is a pleasant Bed and Breakfast in Acassuso, one of the beautiful neighborhoods and residential areas north of the city, just 25 minutes by train from the center of the city.
Contact: 4742-6491 / Website

Garden House BA:
Av. San Juan 1271 (San Telmo).
A great and friendly hostel located in San Telmo.
Contact: 4304-1824 / Website

Lodging For All:
Cozy guesthouse. You can rent a mobiled room to live with privacy and independence in a refurbished Italian style home in a secure central city area, close to cafe's, restaurants, nightlife.
Contact: Website