Just a few words: Yes, the cost is high, look at your itinerary and assess if you really need the car all four days, or even at all. Many automatically assume a car is best, in Italy, that is not always the case. Does your quote include insurance? If so, there may be a third party carrier than can offer it cheaper, if not, and you are planning on using coverage via your credit card, check to make sure you are covered, many cards do not cover you in Italy (and Ireland as well, something about "I" countries?) Finally, do a search on traffic tickets on this board. Italy is notorious for it's restricted zones (ZTLs) and now I have read, their Red Light Cameras. If you think the car is expensive, even one of these fines can runs you several hundred dollars, some get 3 or 4 tickets.