I think Fred's concern is pretty valid. Most of the CAD houses that I used a few years ago have suffered as a result of more accessible software, and cheaper hardware becoming readily available. Even small engineering consultancies now tend to have their own CAD facilities, and A0 plotters. CAD isn't a niche market any more. The aforementioned CAD houses have now had to diversify, doing more things like commercial posters, printing of digital photos, and some graphic design, but even this type of work is diminishing with the increasing availability of easy-to-use software, and cheap hardware.