I just sold a 2 bedroom / 2 bathroom apartment with a balcony, deeded parking space, and roof deck with parillas in a 2 year old building in Villa Urquiza. The expensas started out 2 years ago at $275 when I bought the place and as of last month they were only $325. Its a small 6 unit elevator building that has NO encargado. Just a person legally registered as monotributo that came to clean 2x per week for 4 hours a shift.
The key is to look for a small building that has NO full time employee, that way you are insulated from the high costs of maintaining an employee. And I tell you, don't blame the encargados. Where I live now, the salary of the encargado (in hand) is $2,700 per month. However the "cargas sociales" as they are known, which are social security taxes and union dues are $2,000 per month additional on top of the salary. So either find an apartment in a small building or a very large which also tend to have lower expensas as all of the building costs are spread out between a large # of units.