Dollars or the equivalent in pesos! which is the difference??? The ATMs of Itaú bank give you dollars from your US account (you have an US account?) and cost US$5 every US$100 you get.
Anyway, I have a studio in palermo,.. how many pesos you want to pay for a monthly stay?
"cabañas", cabins and rustic houses and "boutique" places at www.cabanias.com
In Bariloche tehe are like 90 places!
http://www.cabanias.com/subregiones/bari.asp
I found these:
http://www.idearental.com/new/detalle.php?id=396
http://www.idearental.com/new/detalle.php?id=15
They do good discounts for long term if you pay some months up to front. Try them!