hi there...I was in brasil and I stayed just a night in sao paulo ..loved there .I hope I can visit there again...you've asked me about the hostel in BA called america del sur...it is absoulutely a great choice my friend esp the room you choose will give you some extra space :) I met a lot of nice people out there and I am pretty sure you are going to have some too:)...keep in touch! have a nice and unforgettable trip ...besos