You should budget to spend between 500 US Dollars (spartan life) to 1,200 US Dollars (good life) a month.

ESTIMATED PRICE LIST
This is a general list (in argentine pesos), intended for informational purposes, since the price range is wide and the offer varied.
ACCOMMODATION
5 star hotel: double room: $ 850
4 star hotel: double room: $ 500
3 star hotel: double room: $ 180
2 star hotel: double room: $ 100
1 star hotel: double room: $ 65
Apart-hotel: $ 148 per appartment.
Inexpensive accommodation: $ 35 per guest.

MEALS
Pizza (8 servings): $ 5 to $ 30
Pasta: $ 5 to $ 20
Parrillada (barbecue) for two persons: from $ 15
Empanadas (small meat or other fillings pies): from $ 1 (per unit)
Ice creams: from $ 2; 1 kilo (2.2 pounds) between $ 8 and $ 30
Tenedor libre (all-you-can-eat restaurants): from $ 12 (per person)
Breakfast at a confitería (patisserie): from $ 3.50

TRANSPORTATION
Bus: $ 0.75 (minimum fare) and $ 0.80, within city limits
Subway: $ 0.70 (flat fare)
Taxi: basic fare of $ 1.80 + 0.20 each 200 meters (220 yards). Average trip lasting 8 minutes: $ 5 to $ 6.
Trains: $ 0.50 (minimum fare)
Car rental per day: $ 90 to $ 200
1 litre of gasoline (0.2 gallons): $ 1.84

GOING OUT
Movies: $ 7.50 to $ 11. On Wednesdays, all through the day and in all theaters, tickets cost half the price. Some theaters offer reduced prices on other days as well, and there also special theaters with tickets at around $ 5.
Concerts and music shows: $ 6 to $ 50 or more for performances by internationally acclaimed artists.
Fee for Colón Theater: $ 5 to $ 140
Fee for a soccer match: between $ 15 and $ 30 (local matches); $ 20 to $ 50 (international matches)
Admission to museums: free or fee ranging from $ 1 to $ 3.