That feels about right. I think closer to $20m
I typically calculate around $800,000 for each house, and $75,000 for street = about $8.4m. That cost includes construction, purchased props, freelance design work, costumes etc. I treat it as a "total cost" estimate.
Roughly 40 performers each, plus 5 support positions, at a rough average of $11/hr. Average 28 hrs a week over 7 weeks. That's about $6.5 m.
So, you're at $15m just in the event itself.
It's safe to add another $2-3m in merchandise/food & beverage. Another $1m in marketing. $100,000 for shows. $100,000 for additional security.
In general, I'd ball park the HHN budget around $18-$19m.
THEN we get into routine park operations, which likely adds another approx $2m-$3m A NIGHT, which is the forgotten number, since the park is still a park during HHN. That adds an additional $60m-$70m to the overall cost of the event.
So, I'd wager Universal spends $90-$100m a year on HHN in Orlando.
In Hollywood, they spend $50. $48 of those dollars is spent on flying Murdy in from Ireland.