Scheduled to arrive at CPT at 05:00 on QR from Doha with only hand baggage. It looks like the first international arrival of the day.

If things run to schedule, what sort of margin do i need to get myself to the domestic terminal and onto a JNB flight?

My long weekend in Cape Town pre-Johannesburg got shelved. Switching the QR flight to JNB would cost an unbelievable number of dollars