Buenos Aires, Argentina
150 Argentine Pesos (approx $39)/night
After one sleepless night, we couldn't wait to get out of Plaza Disgusting. When our passport errands were done, next on the agenda was finding a new hostel. Right near the subway with a private bathroom and an AC, this place saved the day.
I unfortunately forgot to take photos again. You must be bored of looking at pictures of beds by now anyway. If not, you could always check out their swank website (not really sure if putting out bread and jam in the morning qualifies you as a "Bed and Breakfast").