re: Italy trip average costs

As others have said it can vary wildly. We did 10 days for our honeymoon 5 years ago. 3 days in Rome, 2 days in Florence, 3 days in a villa on the outskirts of Florence, and 2 days back in Rome. It was roughly 10k, including airfare. We definitely could have done it cheaper, but it was our honeymoon and we didn't want to skimp anywhere (nice dinners, wine tasting class, vineyard tours, villa, etc...).