So below isn't quite working as expected, the offset is double what I expected but can't figure out what's going wrong. I thinking if you can place the model so the clip point is at z = 0 it should be enough to at least prove or not the idea works. The process involves adding these nodes to each of the materials to be clipped.

The "P" node generates the offset from the Z axis in inches with negative values going backwards. The idea with the "offset "node is to adjust the clip distance - for example "10" should mean to clip 10 inches further back but at the moment it seems to be doing double for some reason. The next node "Mask Minmum" forces any z value in front of the clip distance to zero (or off), The "Remove Sign" forces any non-zero input to be "1" (or "on") . This is then fed into a blender node to set transparency.