Well the other thing that pops up is how much can you really carry on a regular basis. How much bulky light stuff does one get now that can't fit into a cv or even a sprinter?
So let's play a little comparison that I just got done playing with:
I have worked the operating cost with a sprinter 3500 chassis and a custom 14 foot box and that combination actually works out almost the same as if I would go with a GMC with the same size box but made by Morgan. The lower mileage with the GMC compared to the little higher cost of maintenance on the sprinter is about even, so if you get the 19mpg with the sprinter, the GMC may be the better choice.
BUT
The sprinter chassis is less than 4500lbs curb weight, about a 1000 lbs less than the GMC, the box weight is also about 600 lbs less than the box on the GMC, so with a 9990 sprinter chassis and box, I now can haul more which means I make more.
Now here is the kicker, the up front cost is a lot more with the sprinter, at least 10k more. I have an estimate for the box, it is custom but it cost a little more than the Morgan, by $1100.