It is one of the most difficult things to get a work permit in Argentina if you don´t have the proper paperwork. It could make your life a nightmare. I have expat friends in Cordoba who have been battling for nearly 2 years to get a CUIL. The authorities make them run a round in circles.
I travelled solo in Argentina without any problems. Yes there are unsafe areas in Bs As capital and other big cities but that is normal. Petty crimes are common especially close to big bus and train terminals. It will be sad if it is becoming unsafe because so many tourists come here every year.
We are a Hostel in Santa Rosa de Calamuchita - 12 kms from VGB and have been providing accommodation for the Oktoberfest for the last 3 years. If you are interested visit our webpage: www.tinktinkie.com for more details. The bus stop is 700m from the hostel and buses leave every 30 minutes to VGB.