In my opinion, you have enough of a case to get able to get to first base in Argentina (a precaria residency as either a rentista or a pensionista).
If (on the lawyer's advice) you can get to first base as a pensionista, I imagine you could progress quite quickly to then actually obtaining the residency itself, and from there proceeding to citizenship, or whatever you want.
If (on the lawyer's advice) you can only get there as a rentista, I am quite confident in predicting that you will never progress to actually obtaining the residency but, from what I've read on other threads, will be able to apply for (and possibly obtain--with the lawyers help) citizenship.
If (on the lawyer's advice) you can get to first base as a pensionista, I imagine you could progress quite quickly to then actually obtaining the residency itself, and from there proceeding to citizenship, or whatever you want.
If (on the lawyer's advice) you can only get there as a rentista, I am quite confident in predicting that you will never progress to actually obtaining the residency but, from what I've read on other threads, will be able to apply for (and possibly obtain--with the lawyers help) citizenship.