Interesting idea, but not so sure how it would work in practice.
We often are out on locations, photographing properties for virtual tours. Perhaps 3,4 or even 5 properties in one day.
Say each property had 10 scenes, each scene has 12 images (in our case), each image is 3-5MB in size.thats around 300 - 600 MB per property. I would hate o have to email thats kind of file size to an outside contractor, it would take forever, and "snail mail" of a CD would be too slow.
We have already received offers of this kind of service from other companies, based in India where the hourly rate would probably be considerably less than Canada.
Currently all processing is done "in-house" and we always aim to have a quick turnaround for the client. As said before by others, we retain control this way. So as said earlier, interesting, but not sure how it would work in practice.