Herc, DCA-BOS is almost certainly the easiest commute in the system.

You will need a crashpad for reserve. After you hold a line, you will likely need to keep the crashpad for a little while, until you can hold commutable or partially commutable trips.

Once you can hold commutable trips you will not need a crashpad. A commutable trip is one that starts late morning or in the afternoon, and yes you can commute in for that trip same-day. Hopefully that trip also ends in the afternoon or early evening, and you will make your commute home same-day.

Because of DCA-BOS flight schedule, even some trips that start mid-morning can be commutable same-day. And as others have said, lots of DCA layovers on the E190.

Like I said, easiest commute in the system.