Train trips of more than 5 hours run on cruise line principals and are not about getting to a destination. Any train for those trips is a tourist attraction and should pay for itself and all crew needed. Boston to NYC isn't 14 hours, and should not stick to steam train principles.

As for food, get off at any station and eat.

Yes bathrooms beed to be cleaned. However that is one person who cleans them between 2 stations and then nobody for the next station, and someone the station after. (This is an example, the real way to handle it might be different )