I hope for you that Francisco's condo is available when you go to BA. We spent a full month there and felt a bit sad when we left.
The kitchen may look small but it is fully equipped and we cooked most of our meals there, meals that we enjoyed on the terrasse (one of the greatest asset of this condo is the terrasse - even better than on the pictures!).
Many of the things we wanted to see were at a walking distance (we like to walk) and we hopped on the metro or the bus when our destination was too far.
Francisco was the perfect host. He made sure we had everything we needed and was always just an email away when we had questions.
We are returning to BA soon. The only reason we are not staying at Francisco's place is that someone has already booked it.