Itaim is the best place to stay in São Paulo either on leisure or business. There are 2 supermarkets walking distance, 2 malls, pharmacies, Dry Cleaning, nice restaurants (348, Pobre Juan, Ruella) and 2 public parks (Ibirapuera and Parque do Povo).
There is a Taxi stop in front of the building. Easy Taxi and 99 Taxis are very useful apps in São Paulo as well. As its closed to Faria Lima Avenue bus transportation is also very convenient.