I will probably be the only one who feels this way, but they have the money. I am not a fan of the Kardashian clan, but I see no difference in the family that spends $300 on a bowling party and makes $30,000 a year. It is all relative. DL is a business and one who offers the opportunity for people to rent them out if they have the money. They are doing nothing wrong and aren't asking for people to fund it for them so they are hurting nobody. It is no different than a corporation renting it out for their employees or for a red carpet event. They are doing it for themselves and the others in attendance than for North, but I'm sure she'll have an amazing time. I don't think it is entitlement to pay for something you want that is for sale just because it is more expensive than what most could afford. Entitlement is thinking you should have it even when you cannot afford to do so IMO.
I can see where your coming from and I really wouldn't have a problem with it if it was scheduled in advance and let people who are paying for airfare, hotels, etc in advance know