The hot opportunity right now isn't in real estate, it's in flipping Ferraris.
The gap in market value between the worth of a Ferrari in Mendoza and Capital is staggering. You fly to Mendoza, buy your Ferrari in cash, drive it here and unload it, rinse and repeat.
While you're doing that, we just rinse.
EDIT: Make sure you bring proof with you to Mendoza that you are indeed a millionaire, as they won't sell to you otherwise.
They're very particular about that.