Sorry about that...
If your husband wants to work in graphic design, then it will be very hard for him to get such a job in Taiwan.
Gone are the days when just being a native English speaker was enough to get you such lucrative jobs. He will either need a very sought after skill or conversational Mandarin skills in order to get such a job.
Why doesn't he do freelance work as a Graphic Designer? I'm sure he could sell his services via a homepage and market it to the world. That way, no matter where he lives, he can still do his Graphic Design work... Just a thought that is.