Bringing in a Ferrari is an open invitation for the AFIP to put you under the microscope and through in a full rectal exam (hopefully not literally, but hey, it's Argentina, they may well decide poking and proding is necessary to evaluate your financial condition).
In case you haven't been paying any attention to economics in Argentina, the way things are going the AFIP is indeed keeping a register of any owners of luxury cars and are indeed using that ownership as an excuse to check their financial records. While this has been popping up only occasionally in the news, as the economy goes further into the crapper you can expect your name to pop up on that list. And Kiciloff has already insinuated that there will be new sanctions applied against those purchasing luxury cars from here on out, not just importing previously owned ones. Apparently there will be some announcements before the end of the year, you may want to start reading the news here.
Whereabouts is your apartment anyways? Most people owning that level of luxury car are not keeping it in Capital, they're out in a closed neighbourhood in Pilar. Otherwise they're in one of a few barrios here (del Parque, Ingles etc).
It's not even just potholes, at a lot of the intersections there are huge bumps where the streets meet, a kind of speed bump if you will. And they have put in tonnes of speed bumps in certain nicer areas as well. I'd definitely come here first and drive around in a normal car for awhile before deciding whether you really want your Ferrari.
You've supposedly lived here before, but maybe you've been gone so long that you've forgotten -- Argentina isn't nearly as materialistic as the USA. People here tend to value relationships over things. Maybe that's why a lot of the people that you meet here that would value a Ferrari over the person are not people you'd trust whatsoever. Bringing in a flashy car you're really going to have to be wary of who's taking advantage of you, who might just want to slit your throat (figuratively and literally). If you're Spanish isn't great and you don't already have a nice secure circle of friends, I certainly wouldn't bring in a Ferrari as your first notice of arrival. Leave it for a bit, see how you feel living here, and you can always bring it at a future date.