As an FYI, WashU offered a form that could be completed before application to estimate NPC. There was a non-custodial component. They may not be on your list, but it might be an option to take advantage of as a frame of reference. Lastly, the only school we found with an online NPC to account for this was Princeton. Hindsight, they are more generous than the avg school, so not helpful as a frame of reference.