All post have been good information for you to use.
I have talked to individuals who have done it both ways. Mounts completed in Africa and then shipping them home or shipping the raw material home and having a local professional taxidermist complete the work....The individuals were all happy...and were comparing the basic final costs.
Having work performed by a good African taxidermist will cost less than in the USA, however the shipping home is more expensive. All said and done the cost are about equal having the work done in Africa or having the work performed at home.
When i go next year i will look at having some work performed over their and some in the states. That way i believe you will reduce some costs. Like European mounts, tanned hides performed over in Africa and the life size or shoulder mounts in the states.