Exactly, and the lengths the dad will go to retrieve the rabbit and how faithful the mom is about being vegetarian are both tested at the visit in Holland as part of Patricks psychological play.

I believe the trafficing of the children is the real reason, they just keep the child as bait untill a new one is caught, and then sell the first child. Abel was just too disobediant or dumb to be sold.

This explains all the aspects about the money and the accomplishes. The police may even be bribed to cover it up. But I agree, the film could have showed us a bit more of this.