What do you think the nature of the drop information or documentation is/was? Damning information about the Clintons? Once Mom went missing, there would be little chance of anyone unrelated to her getting back into the house and even relatives would look suspicious removing things at that point.
Deep state horror/corruption/election rigging… imagination run wild.
With money and assets it would be pretty rote. Log the goings and comings of the neighborhood over X time. Mock up some type of service vehicle, roll in early on a Sunday, have set watchers and blockers, blast a WiFi jammer… Worst case scenario you might have to get rid of “a problem(s)”, but it would get attempted, likely successfully.