Problem with modern tractors and glass is, most of them (mine included) are glued in so changing it at home without the proper tools is almost impossible and I don't believe 'Safelight' can do it either. Last time they did the windshield glass in my wife's van (it's glued in as well) they did a rather poor job of refitting the cowl trim. Left some screws out, must have been in a hurry. Up here, glass is covered on all policies, Michigan seems to be a windshield breaking state....lol
Cab glass is expensive anyway. I shattered one of my doors by stupidity and it was almost a grand for the glass alone and I did the grunt work myself. Needless to say, I keep the doors closed now when moving.