If you're looking for an affordable central spot to rest your head while passing through Rome, Art in Accommodation fits the bill. You'll be just minutes from Termini Station, and a few steps from the nearest metro stop, Vittorio Emanuele.
Guestrooms offer the basics – beds, nightstands, and wardrobes, plus free WiFi. You'll share a bathroom with others on the floor, and be sure to bring your own toiletries as they're not provided by the hotel.
A free breakfast is offered at a café about 5 minutes down the road, which will have you powered up for your 15-minute walk to the Colosseum afterward.
You can hop on the metro at Termini and ride to anywhere in Rome in under 20 minutes. Or if you'd rather walk, major sights like the Trevi Fountain are around 30 minutes away.