I'm responding before reading through all the posts so sorry if this is repeated, but just wanted to chime in that it's my understanding about community property that the spouse is entitled to half of only what you acquire AFTER marriage, i.e. if you buy an apartment after marriage, and divorce, the spouse gets half the value of the flat (if you ever sell it or if he sues you for it). Anything you earned before, or are due to inherit from your family, doesn't get added to the community property umbrella.
The other thing i wanted to share is that I heard from someone who was here on a rentista visa, just how easy it really is.... i.e. "you have to deposit 8,000 pesos in your Argentine bank account every month" (or whatever is the minimum amount, I'm not sure...) "but you can take 8,000 out one month, put it back the next month, and nobody every checks." I could be wrong, I don't know from personal experience, but would love to know if it's really like that!!