It's even higher than what most would expect.
Bingo, you will specifically have to ask for a 1 park 1 day ticket.
I've been saying about Gringotts
With respect to everyone involved I've never really cared about the budget but I knew it was by far the largest Creative has ever had to play with. On top of that there still using cost cutting measures to stretch the massive budget even further. The numbers I've heard mentioned are between 460-500 million for Diagon alley. Does not mean I'm correct in anyway shape or form. Again it's just what I heard.
But! One last thing before I finish to confuse the hell out of everyone. During Phase 1 things were cut and scaled back to counter certain aspects that were going well over budget. This is somewhat custom now a days by robbing Peter to pay Paul to complete a large scale project. This was the norm for old owners Blackstone. Now with new owners Comcast at the helm things get plussed not scaled back. So it's very possible the budget was increased by Comcast during the construction phase in order to add more effects and options that were originally considered unnecessary.