After trying several hotels, b & bs and accommodations in Rome (and when I say different I am talking about at least 20 accommodations) I can make my personal ranking on the top 3 accommodation in Rome that I advise you to evaluate before booking for a holiday in Rome.
The accommodations that I will name below are not at all in order of importance, I cannot say which of these 3 is the best, the first that you find free I recommend to take it, each of these has its own strength and in my opinion all three are extremely beautiful. All three are found in San Pietro area, I'm sorry if you preferred other accommodation but I think this is also the best area from which to start visiting the city. In fact, with a short walk from here you can reach the Vatican Museums, Castel Sant'Angelo and Trastevere, better than that!
B&B in Casa di Nannalì. The first b & b I tried in Rome, and it was love at first sight. I sent friends and parents too, all impressed by the cleanliness and discretion of the owner Annalisa. The 3 rooms are all very large with private bathroom and a really interesting breakfast, think that in April I ate strawberries for breakfast. The strong point of this b & b is the view on the cuppolone. All three rooms face St. Peter's side and in the evening the balcony of the rooms offers a show that you can only see in postcards. A room with a view (and what a view!) Which is worth all its 80 € for a double room with breakfast.
B&B Gli Artisti. A recent discovery was this beautiful b & b located on the top floor of a building in the San Pietro area. The extreme kindness of the owner Alessandro make this place a small refuge in the jungle of accommodation in Rome. Quiet and colorful, the b & b offers its guests the kitchen made of mirrors. The hanging cups and the small attentions in the services make guests feel at home. The rooms are large and have an en suite bathroom with a mosaic shower. The strong point is the kitchen available for the evening herbal tea, for example, and the extreme proximity to the Ottaviano metro, a couple of streets behind. Here, too, the price is around € 80.
Internal 2. A corner of real Rome in the heart of San Pietro. Exactly behind San Pietro there is a characteristic area, a small village made of walls and cobbled streets. Here you will find antique shops and small artisan shops that follow one after the other. In via Borgo Vittorio there is a building which houses two of the proposed apartments. I recommend the one with a kitchen, even if you don't plan to use it, know that it will give you an idea of home that you don't imagine! The kitchen is equipped with every comfort, goblet glasses and dishwasher to organize a small dinner. The bedroom is large and in the morning breakfast is included thanks to the jams, rusks, tea, juices and coffee that are in the fridge. The apartment has an average cost of € 80 with a minimum stay of 2 nights. Alternatively the owner Sergio has another apartment next to this very similar one, but without a kitchen at the price of 60 € per night, always with a minimum stay of 2 nights :)