Yes, it can be very expensive, or it can be comparatively cheap. It depends on how you go about it. These days, I develop my own black and white, which brings both control and thrift to the process. For developing that I send out, which is all color, I do some real comparison shopping. I find that some places cost literally double what others do. So far, cost is not a significant determiner in quality either, which is interesting and somewhat unexpected.