Another thing to consider: At my last 141 gig, our CP never got to fly because there is always a new project, syllabus, student issue, or general fire requiring the CP's attention. My boss had a goal to fly with all the instructors and check instructors and it never happened because of the demands on his time. You should definitely consider how much time you'll have to keep your skills sharp if you want to keep on the flying side. If you're wanting to go to the FAA or something like that, the CP slot would be beneficial as well.