I’m all for business cases. You should definitely do one for major (and minor) projects. And they will cost in the millions for large projects.
But $120 million is an obscene amount for a business case. Let’s say you pay $2,000 a day for consultants. That is 60,000 days of consultants. That would be 240 consultants working every workday for 12 months to cost $120 million.
And taxpayers and ratepayers will be funding it.