Fwiw, in my neck of the woods, it isn't uncommon for people to commute from the Wyoming Valley, Lehigh Valley, or the Poconos to NYC on a daily basis. It's about 2 and a half hours on Martz or Trans-Bridge coach buses. Last time I checked, a commuter pass for Martz was $800.

I think, for less than a year, commuting to Harrisburg on Amtrak is manageable. Delays are less common and the Keystone is really comfortable compared to a coach bus. Being cheaper than Martz is a plus, too. Anything more than a year or two might be excessive.

I recommend doing what another commentor said and try the commute before you take the job.