I'm not sure the whole group was there the whole time. They were in control of the house. If they came in a vehicle, no reason that some could not have come and gone, in that vehicle.
The amount of pizza eaten is not an indicator to me, because I'm sure the family had plenty of food in the house.
As for the money, I'm just not sure that the friends found with DW and the money were creating money orders, and riding around with thousands in cash, all with only neighborly altruistic motives. We are not even sure at this point how much money AND DISPOSABLE valuables were stolen. Supposedly, DW did not take all the money to NYC because his friends were helping him create money orders.
Now that takes a lot of trust...to hand off big money to friends and leave town.
Do we even know that DW himself had the money. I think we only know that the group in the car/truck convoy had the money and conveniently blamed it on the one person whose DNA nailed him to police.
"Oh this is HIS money, Officier, we were just giving. him a ride in these two vehicles."
Y