For a modestly priced hotel in Rome I have stayed at the Hotel Forte on via Margutta just a few blocks southeast of the Piazza de Popolo. It is on the second floor of a building on a street of antique shops. It is also within 2 blks of the Spanish Steps. Just a few buildings north of the hotel is the house where Gregory Peck lived in the movie Roman Holiday. Google "Hotel Forte" as they may have a website.