I am just back from 15 wonderful (cold, rainy, amazing) days in Italy, and almost recuperated from the bad cold that plagued most of my trip. It worked out well for me that the days were short, as I had little strength left by day's end once my cold came on. I travelled solo, flew into Milan, trained to Verona, Venice, Ravenna, Florence, then Rome, whence home. 15 full days. Here's what I spent, not including airfare:
239E (12%) on local transportation, mainly trains
319E (16%) on food, come restaurant meals, mainly snacks and groceries
215E (11%) on entrance fees and audio guides
1078E (53%) on hotels
179E (8%) the rest: mainly souvenirs, a few sundries
Total 2,029E which comes to an average of 135E per day.
I looked for budget-priced accomodations, but all were ensuite (private bath), all were clean and central and I would not hesitate to recommend them all. I didn't eat out a lot. Lunch was usually "street food" and about half the dinners were in my room.