Hum. When you say "transportable" to you mean that the object being restored is to be transported, or that the overall skills/tools would be something that someone one the road could 'peddle' in a variety of locations?

The idea of the object being transportable is harder to tackle, because of the need for a certain level of 'stability/sterility' in the setting that the work is done in (given my limited knowledge of textiles restoration work).

If it is a matter of the job skills being transportable, it might almost be better if the person was a specialist because it would allow them to be called from place-to-place to deal with specific artifacts and their upkeep (whereas someone who is a generalist might find it harder to locate work readily unless they were well known in the field).