Michael is by far the nicest man I got to know. He tried as far as he can to make my stay good.
The apartment is more student-like one and not super clean but I got a very nice private room at him and even when I wasn't inside the house he helped me finding myself by Facebook and Airbnb app.
The apartment is in a safe place and 3.5 peso and 30 minutes by bus/train to the center of Buenos Aires. The buses working until the latest hours of the night.
He suggested that he will try to book a flight for me and I'll give him back the money. He helped me to find the important things in Buenos Aires.
I can only be thankful.