So power can be generated for the grid without taxpayers having to cough up billions of Rands, nor does it take 8+ years, and ends up being double the original budget!
Yes, but that maintenance is also proportional to the amount of mechanical and moving parts where there is wear and tear. So I'd expect wind turbines to have a lot more maintenance compared to solar arrays, as an example. Another added advantage of both solar and wind, is the ground underneath can still be utilised for farming without lots of air pollution either...