The more you read about this, the more evident it becomes that the Victorian model was doomed to failure. I hadn't realised that little if any of the events were going to take place in Melbourne using the existing facilities. Instead they had chosen 5 provincial hubs which required substantial investment in new facilities and infrastructure. Some sources are suggesting that despite warnings over the additional costs associated with this model, the provincial hub approach was used as a way to secure votes during the 2022 election.
The Commonwealth Games Federation have been aware that the biggest challenge to finding a host has been the cost and to counter this they took the decision to strip the core sports back to bare minimum - athletics and swimming - but again the Victorian government chose to ignore this. Not only did they maintain the full list of sports staged in Birmingham (with exception of judo, rhythmic gymnastics and wrestling), they added golf, rowing, coastal rowing, shooting, BMX and mountain biking.
The initial estimate for hosting the games was in the region of GBP 1.3bln - that's getting on for double the costs associated with Birmingham. Surely alarm bells should have been ringing as soon as they generated that estimate. For the latest cost estimates to be 3 times that original budget is mind blowing - no competent program manager would allow the budget to spiral so far out of control and would suggest significant mismanagement/interference in the process.