So, when I priced out Atlantic for a wedding in 2016, for 6 hours it was roughly 60k rounded down. Me and the ex-wife wound up doing the ballroom at Portofino for 10 hours, with dinner, dancing, and alot of add ons for a total of 75k. Cost wise, it was a better deal, because dinner options kept adding onto the cost with Atlantic. And they wouldn't let my ex's jazz band perform without some serious implications. The Port was the better deal.
On average, to have a character present for a private event, it's about 5k a character for a half hour set for 2 sets. It's not cheap. There's alot that goes into that cost. Performer, attendant, cleaning, and it could go up if it's a character that's hard to come by. Pain and Panic are a good one in this field as well as Darkwing. They're expensive per set and will run a pretty penny but worth it.
That being said, it'd be awesome to fork over a couple of k and have the performers in an element they could groove to again.
I'd also recommend no one ever have a wedding with over a 150 guests. It was a nightmare cost wise. And I'm pretty sure I never saw most of those family members again after that.