I think they are at .80/mi plus .35 for dh and whatever their surcharge is (I think it’s currently around .11/mi. The reason I know this is I know someone who drives for them).
I don’t know what your talking about. Glow plug problems? Never had any problems with mine. Just changed mine out recently at around 615000 miles only 2012 Sprinter. Changed all 6 of them. Easy out and easy in.
Read from the newbie section. Probably go back 1-2 yrs. and read every subject that may help you with starting out. Probably best to start driving for an owner if this is your first time doing this type of work to see if it your cup of tea.