I'm going to stay at Crowne Plaza Newton during the Independence Day weekends. Is there any cheaper shuttle service that we can book a RT between BOS airport and the hotel?

Tried supershuttle, but they do not have shared van service to the specific hotel, all I can find is a local company called ultimate livery & shuttle offering $60 RT.

My departure flight is early (6AM flight), so I need the shuttle to be on time. Thanks a lot.