I travel alone 3-4 months a year, that's a lot of motel stays. I drive 30,000 miles a year in an SUV that is much larger and more gas hungry ( usually I average 750 gallons of gas, 12,500 miles on a trip) then I would ordinarily choose, if not for the fact that I need to carry enough gear and supplies to last me nearly 2 months at a time on the road. When you do this for a living you don't sleep in or go out and shoot when you feel rested or in the mood, you shoot 7 days a week. In my case for usually 6 straight weeks at a time. I've stayed at so many different motels on a trip, 28 motels in 42 days, that when I got home I handed my wife a credit card and requested a non smoking room with a queen size bed. If I'm lucky i'll get 8 usable images a year.
The remaining 8 months a year are spent processing film, printing, spotting , matting, mounting and packing mounted prints for shipment. All of which loses it's luster a bit when you have to produce large volumes of finished, mounted prints.
The costs of travel, equipment, facilities, supplies, insurance, travel, packing materials, etc really add up. And for all you invest in time, money and effort, there is no guarantee that you'll sell a single image. Even if someone is charging an elitest price for a print doesn't mean they're actually making much money from it, especially for the investment of time.