The house that Sandy lives in is the same house used in The Godfather (1972), when Tom Hagen meets with movie producer Jack Woltz, preceding the iconic severed horse head scene.
The girls are Adam's real-life daughters Sadie and Sunny.
To promote the film, Adam Sandler visited Las Vegas Motor Speedway, and was filmed in character offering his services as manager to NASCAR drivers Dale Earnhardt, Jr., Joey Logano, Denny Hamlin, Kurt Busch, Ryan Blaney, Austin Dillon, Ricky Stenhouse, Jr., and Kyle Larson.
The place where Sandy is staying is not the same mansion from Billy Madison (1995). Billy Madison was filmed at Parkwood Manor in Canada. Sandy is staying at the Beverly Mansion in California.