Something that hasn't been mentioned: most AirBnbs in Europe will not have elevators and will not be on the ground floor. You'll have to bring your luggage up many flights of stairs on your own. If you're in a smaller town or the countryside, you will absolutely need a car to do anything, whether it's see sites or go to a restaurant. And as others have mentioned, AirBnb isn't always the most ethical, as it takes jobs away from locals and hikes housing costs for them, too. I adore Italy, having been several times - and all over the country. It's an incredible place, full of history and beauty. But if you haven't been out of the US a lot, you need to re-adjust your ideas of what a trip looks like in order to make it enjoyable.