A cargo van owner/operator leased to an expedite carrier could reasonably expect to gross between $45,000 and $80,000, some more and some less. A driver for an owner usually agrees to a 40/60 split so you could expect to net $18K to $32K.
Expediting is a cyclical business with busy days, busy weeks and busy months. There are also slow days, slow weeks and slow months. One of the keys to enjoyment in expediting is knowing, or guessing, where and when it's busy for your vehicle type, your carrier's customers, your work ethic. Different owners pay differently, some carriers are flat rate, some are percentage based. Unless your among the mobile homeless, it also matters where your home base is located.
The successful among us don't view how much we can earn weekly or even monthy; we look at quarters and whole years gross. Maybe_driving's answer above was, based on my experience, an accurate answer.