Certainly the SA training market has seen a boost, but mainly due to the Visa situation in US. To go to do a PPL in SA it's just a case of going in on a tourist visa (available on arrival to EU passport holders and is valid for 3 months). Also the SA training is just about completely JAR compliant so the conversion of the license is relatively straight forward in terms of the similarity of training to the JAR one.
As for working in either the SA or the US as an Instructor - the problem is the work permit/green card. So usually a non-starter for most of us!