^^^^^^ I strongly suspect SA will be the next SH host. 2027 would give them ten years to sort out their issues & leave enough time to develop a bail-out option if they can't (said bail-out option would need to be promised they're the next host should SA deliver).
I don’t see there issues getting any better, the longer they leave it the further they get away from the 2010 FIFA World Cup when all their stadiums were last upgraded.
Realistically they should have bid and hosted it for the 2011 RWC when all the stadium and infrastructure were new and experience was fresh.
Australia can’t sit and wait for South Africa to sort out their shit, Australia must bid for the next RWC IMO.
These are figures that the Australian government wouldn't smirk at, even if Rugby Union is currently behind League and AFL for prominence.