What important papers? They've spent every dime Bob saved, the deed to the house is sitting at the Bank. Nah there is nothing of value in that house anymore (if ever).
No joking aside, I don't think anything that was there could ease/improve or alter the path Chris and barb are on. Bob may have kept stuff that at one time was important but it's either not useful anymore already gone or just where bob kept things for the household (copies of bills, recipets etc,) that they managed to double down on neglect