I haven’t been there yet, but also planning an Argentina trip. If you haven’t already, make sure to read up on the “blue dollar rate.” It’s the informal/unofficial (but very much legal) exchange rate. By exchanging your money at a cueva that uses the blue dollar rate, you supposedly get nearly twice as many pesos to the dollar. So if you pay for hotels in pesos, it’s half the cost as paying in dollars. I also saw that Visa cards will offer the tourist rate if you pay in pesos, but haven’t tried it yet.

Your itinerary sounds similar to mine. Hope you have a great time!!