We know the actual note was written using paper in the house, and a sharpie pen. I believe it was a kidnapping gone bad by amateurs with a substance abuse problem that thought they could make some quick money. Certain items were brought into the house.....duct tape, stun gun, possibly a bat & rope. They would have some kind of note in mind...possibly one written out before they entered the house and then recopied...or a general idea on what it would say. A big question in my mind is the entreprenauer article from the year before with JR's picture having a red X on it, similar to "Ricochet," that was found. There was some half-@ssed planning, but it ended tragically because they didn't know what they were doing, and didn't plan on how they would get JBR out of the house.
Had it gone the way they planned, they would have gotten JBR out of the house...JR would not have called the police, and would have come up with the money...and JBR returned, and the perp(s) would have had a big laugh once it hit the news. I think that's all there was to it.