Where in Chelsea? That can definitely swing recommendations to one mode or another.

And from where in Morris County? Near Dover/Rockaway? Or further south like Morristown?

There’s a few other options I’d recommend:

1. Lakeland Bus, which runs along 46 and 80.
2. NJTransit train to Penn, then bus down to where you work (or enjoy the walk/bike)
3. Train to Hoboken, then PATH up 6th Ave (sounds like your work may be closer to there than Penn Station, both are on the edges of Chelsea) or ferry + bus
4. Train to Newark, change to PATH
5. Drive to a Park & Ride which has a higher frequency of buses, like North Bergen or Willowbrook, then bus to Port Authority

I can give you more info on any of these if you want.

If you’re trying to economize on price, driving tends to be more expensive than transit. From Dover to Harrison, for instance, is 30mi x 2 =60mi, which is roughly $38 ($.62/mi, more if you have a pricier car), before parking and tolls.

You don’t have to go to the nearest station or park&ride, but going to one which is not walkable/bikeable to your home necessitates a return trip to that point. Do consider biking for one or more legs, especially if you can choose the days you go in. Train + ferry would be a great option for this. Or bring a folding kick scooter if arriving at Penn/PABT/ferry.