Actually, I can recommend the woman who helped me get my resident visa. She now works with lawers who specialize in real estate and financial instruments. She speaks perfect English and can translate for you. This way you can find a good lawyer whether he speaks English or not. I found that lawyers and accountnats who speak "good English" usually charge much more than their Argentine counterparts who don't. This woman can help you communicate and probably will save you money as well. She is currently helping a friend of mine apply for his temporary residency at a third of the cost of the least expensive lawyer I've heard or read about.
Send me a PM if you are interested in contacting her.