I seem to recall a very long time ago that there was somebody talking about making reasonably sized doors.
I think the idea was to make part of the 'door' a non-animated frame, and then have a shorter, slightly narrower door with a handle at proper height. That would swing open or closed in the placed frame.
I can't find anything about it, but often, it's just a matter of knowing the right word... anybody have a clue?