Before I left, I heard numbers of between R400 and R500 per hr dual and solo, for a GrII. So if you were doing 100 billed hrs, that R40k to R50k. Considering that 30hrs of the 100hrs would be solo, thats sounds a fair effort/reward ratio to me.
Its my plan after playing in the sandpit for a few yrs.
If a school was offering training bonds, I think they are pretty short of instructors. But as always, read BEFORE you sign.