It’s gotta be one of the more expensive investments we’ve seen at a legacy SF park, if I had to guess, probably the most expensive we’ve seen since Ka/ToroUnless they announce a number, we'll never know. Even if they do announce a number, we'll never know what it does or doesn't include so it will never be a useful point of comparison.
I think we can reasonably assume that they spent a lot, but not a fortune. Probably about as much as they're spending on Tormenta? It's a lot, but it's almost certainly not breaking the bank.