If you book ahead of time or get one of the multi-trip passes it's much less expensive than that (I'd budget ~$100 round trip, but you can often get cheaper tickets on the Northeast Regional) and Amtrak really is the best experience. Make use of the loyalty program and any discounts (student, veteran, disability, etc.) you qualify for. Ask you job about commute/travel benefits. For reference, driving would likely also be at least $100 round trip due to tolls/gas/etc.