That trackage is going to need some upgrades.
Its fine for the small branch line, the Great Lakes Central but not for passenger service. I just ran that line back in June with our motorcar group, Cadillac to Petoskey and then over to Traverse City and back to Cadillac. 3 days on the rails. Part of the line into downtownPetoskey was ripped up a few years ago and made into a public walkway, so the track ends just south of town.
That line is in beautiful country, can't go wrong with the scenery!