Airbnb

An alternative option to a hotel is Airbnb. Multiple people could room together and split the price amongst themselves. The average total cost will vary depending on location, number of guests, time of booking, and other factors.  

https://www.airbnb.com/s/Harvard-Square--Cambridge--MA/homes?adults=1&place_id=ChIJHQHIzlx344kRTpLoEhss3RM&refinement_paths%5B%5D=%2Fhomes