Hi Kathy,
There is a Santander Rio bank at Echeverria and Cramer, which is only about three blocks from Zapiola and Sucre. This particular branch is not usually that busy and it's in a very safe area. When you go in, tell the person manning the front desk that you need to open an account (which you will need to do in order to receive wired money) and they will get your name and put you on the waiting list to speak with the correct person. It's quite a hassle to get an account, but if you are going to be here for awhile, you might as well get it over with. Estella is a manager there and she helps with new accounts. Be prepared to bring tons of documentation. It will be a miracle if you have everything you need the first time, so try and be patient or you will go crazy with frustration. Also, when you receive the wired money, be careful about what you put down on the forms as to who it is from and what it is for, as you can unintentionally create problems for yourself if you aren't thoughtful in completing your documentation. Estella can help you with the whole process...she's a stickler for rules, but she gets everything set up properly to avoid hassles later on.
Best of luck with everything and welcome to Belgrano!
Cheers.