Any one know of rental agencies or personal contacts to help with finding living quarters in Palermo Soho, Buenos Aires?
BA has many apartments for rent. In Argentina's prolonged series of financial turmoil, buying an apartment was (I believe) a fallback for those with some cash. So it also has a number of rental agencies, as a simple Internet search will show. I used ByT, one of the biggest, a decade ago and they were efficient. Its website searches by style of rental and location. Note that it serves as a go-between, so the tenant pays the landlord (although a credit card may be requested to guarantee the reservation.) That contrasts with the newcomer airbnb which handles the payments itself. I have not used airbnb in BA but was happy with the results in Europe.