To be honest between 10-20 million, although to match what I have R5 million could do too.
1. My house is almost paid
2. My cars are paid cash
3. I would need to supplement my current income
R5 million getting an interest of 10-11% paid out monthly would be a bit short, but I can live with that.
However R10 million would have me upgrade my house by another 2 million, and then put 8 million in a fixed deposit, which pays me out about R72 000 pm in interest payments at the current interest rate. It will be more than enough, and the spare I can put in a pension which eventually will surpass this amount at retirement.