all real estate in BsAs is quoted and sold in U.S Dollars. (CASH) no cert/bank checks mortgages etc. The U.S. cash issue and transferring it into Argentina is the biggest hurdle but can be done with just lots of paperwork.(another thank you to the patriot act)
Again if buying don't skip using a good escribano (1-2pct of cost) and real estate transactions in argentina are no at all like anything I am familiar with in U.S. and I have lots of familiarity with U.S.