Working on a vampire hunter mod, cloned a vampire to sleep from 5 AM to 9 PM and wander from 9 PM to 5 AM. After hours of googling I found a discussion on a method and successfully copied the furniture sleep marker from a bedroll to a coffin;
https://fbcdn-sphotos-b-a.akamaihd.net/hphotos-ak-ash4/t1.0-9/10325208_738393722871577_9141476395723742308_n.jpg
Set up a test cell and snuck in at 0530, there she is;
https://scontent-a-iad.xx.fbcdn.net/hphotos-ash3/t1.0-9/10173738_738393706204912_8209637770148910857_n.jpg
Two problems, reversed in the coffin, which I could probably change by rotating the base coffin object 180 degrees on the Z axis. Second problem is getting the bloodsvcker down inside the coffin - I'd rather not move the coffin up since that would require manually lowering it each time I place one, so I'm looking for a way to move the furniture position instead of the base object (coffin). Problem there is the position and orientation numbers are not even close to intuitive, I can't figure out what I'm looking at.