Check and see what union scale is up there for orchestral musicians. That'll give you some idea of what professionals expect. If you are importing the musician you'll have to factor in travel and lodging expenses as well but most musicians I know are happy with home stays.
I would think it would be the same or similar as hiring a professional belly dance teacher to do workshops and perform. And expenses, as
Shanazel said.
I am married to a wonderful drummer who also teaches workshops, if you are interested!
