could be...but a couple of things deter me from that...one is that Patsy set the note so she would be walking down the stairs and appear to 'find' it on the morning of the 26th....so picture Patsy coming down the stairs...she 'finds' the note,as she wants us to believe...and then she reads the part.."WE WILL CALL YOU TOMORROW"...ok,tomorrow to her,at that moment...is the 27th.I think they did it that way in order to give themselves a full day to carry out a plan,and to figure out what all they needed to do..such as getting her out of the house...b/c along with the other lines...'you will need to be rested'...that gives them an excuse to stay home..(other than getting the ransom money),and the 'if we monitor you getting the money sooner' line,gives them an excuse for being seen outside early..(to get her body out of the house).
I really think JR thought LE would find her not long after arrival,as did Patsy as well..(remember the 'help me Jesus' lines...she knew she was going to be needing Him soon ! )...and I think he planned on doing the same thing he tried to do at 1PM...get the heck out of state.He knew that plane would likely still be ready to go at 7am,as was previously planned.
AS for BR...he's a bit odd anyway,and I think they could have just told him JB was sick and close the door to her room,and he needed to stay away from her so he didn't get sick,too,and he couldn't have any friends over bc of her... get him playing w his new x mas toys,such as the nintendo,to occupy his mind...and he'd buy that.
At some point,they realized all of this was just too risky though...and reversed course...can't get JB out of the house? Ok...let LE find her,and then WE'LL leave instead !