The one issue that I have not seen mentioned is the trains from Portland, Maine terminate at Boston North Station. IIRC there are not maintenance facilities there for Amtrak. Perhaps the train could be serviced in Montreal if this was a Canada-based operation.
I would think that maybe a train that originates in Portland, travels to Boston, North Station, and then continues west to Springfield and then north to Montreal might be viable. I am not sure how the train would get to the line west to Springfield. IIRC there is a way for trainsets to make their way to Boston south station. This would probably allow a connection to the line west to Springfields.
I would think that maybe a train that originates in Portland, travels to Boston, North Station, and then continues west to Springfield and then north to Montreal might be viable. I am not sure how the train would get to the line west to Springfield. IIRC there is a way for trainsets to make their way to Boston south station. This would probably allow a connection to the line west to Springfields.