How do I find housing in Buenos Aires? What is the cost of living?

Hi...my off add would be Av.Eduardo Madero 900, Where can i get a good and safe accomodation for 2 people ( females).furnished apt. It has to be a safe neighbourhood and travel time should be less and easy by local transport. I would also like to know about cost of living. Do let me know what all is included in furnished apt rent. What are the various taxes which will be applied on expats and what salary should i expect after all taxesandd deductioons. Thanks in advance