As Argentina re-enters the world, some real estate values might actually go up net of inflation (IMOH).
If I had to guess, I'd find a community where wealthy expats or bankers live and I'd buy building lots (if there is such a thing) on the assumption that more of them will be moving here and they will want to build houses near their peers in the coming years. The wealthy residents should be able to protect the value of the community ie: no zoning changes or highways through the middle.
I don't know about the legalities or the taxes here but in the US vacant land is taxed at low rates so the annual carrying cost is low, no management or insurance required. Its a long range investment, 5-10-15 years. Some years will be good, others not so good, but in the long run this has worked well for me.