1. Anything involving (your) human labor. Unemployment is a constant issue here. If you are going to be doing something that does not involve specialized knowledge nor tools, then I wouldn’t do it. These fields include teaching, managing, sales, personal training, and any trade, e.g. plumbing, carpentry, masonry. Companies can easily find someone who they can pay a local salary to do the same work.
2. Anything artistic. Unless you are Chris Brown, I wouldn’t come to Ghana to do a performance or display art. People here do not value the non-local arts. One exception is that Ghanaians seem to like country music. I don’t know why but I’ve heard several taxi drivers playing the (slow) country music. Maybe it’s the stories?
3. Anything involving renting or leasing. I’ve learned this lesson the hard way. Ghanaians do not seem to understand the advantages of renting/leasing and the legal code does not offer the lessor many protections. Ghanaians like to own things and assume all risks associated with ownership.