Well, if he aims on inspiring us, this has merit. Obviously both of you think it's a tall ask, but an hour or half an hour a day is normally easy to scrounge. Okay, normaly I say that to inspire people to excercise, but obviously this is a much more worthy battle.
Batch painting by going half an hour a day would probably allow you to run through a ton of guardsmen a week. Also check out Talon Raven. AFAIK he had a massive project a year or so ago. maybe he can comment.
Spite