In lieu of spending thousands of dollars, you can apply for citizenship yourself. If you have an Argentine friend, I imagine that he / she would be happy to help; even if such help is limited to directing you where to execute the requisite documents. People are nice here and are willing to help foreigners. Yes, it's tedious process but it's not a complex one. The necessary documents are clearly defined online. It's just a matter of having the patience and perseverance.
The biggest chores are the apostilled FBI report and apostilled income verification letters; which also must be be oficially translated with the translation itself then being legalized. Nobody asked me about depositing 5x the minimum salary each month. They just wanted to verify receipt of 5x the minimum salary each month.
Once you do it you will be proud of yourself for having saved thousands. Granted, if you have a criminal history, immigration violations or insufficient income, that is another story and you'd likely need an attorney. Good luck.