I am not a lawyer but I've been involved in two federal cases that I had to appeal. The appeals cost next to nothing because it is just using what is on the record, as opposed to the trial that involves tremendous work and expense to create. Compare it to producing a movie versus grabbing a few clips from that same two hour production to make a YouTube video.
i suppose it's a case of how they cost it in SA . There is probably many more reasons why the NPA could be motivated to Appeal than we are aware of too, if the list is reasonably extensive , let's hope this happens. In the words of Nel " I am not going to go away" , let's hope he doesn't