doubt I'll have time for anything like this.
Can I suggest that if you grant the family that sort of power, then they should be of some import back on earth. Perhaps royalty or something similar. Also, I can see the "adult" PC's being of much higher power than the child PC's... not always a problem, but could leave them out of some of the decisions.
Sounds interesting though!
Dark Angels 1750 win/loss Record
Win - 23 (Belial helped wreck Ryan's puny Eldar)
Loss - 13 (Brice's Necrons wiped me)
Draw - 2 (The 13th hold out in alpha take and hold)