If you don't mind an early curfew when the rest of Rome is still swinging, quite a lot religious institutions take in paying guests. You do not have to be a practising Catholic to stay in one of these, but be sure to book well in advance as all of the following places cater for groups of students and pilgrims.
Prices are in the same range as the cheapest hotels.
Here below we offer you a list of much of them, so you can choose and make reservation with us. Castel di Leva - v. Triple L. 275,000 Bathroom and breakfast are included in the price.