Charlie s charlie
I agree with that plan of yours. Sounds quite good. I'm not 100% sure of the work rights in S.A, but know a couple of guys that did either f/w or r/w training here, and actually got work. Regardless, no one can take your hours away, and a licence can be converted at any stage of the game.
Just a couple of helicopter ops in S.A : Training, charter, film work, Fire Fighting, EMS, Game capturing, corporate etc. etc. etc.
The best is, as CSC says, find out about the work rights before starting training abroad.
DD