I actually do admire him for having scruples and putting his family first. He even said in his exit but that he was probably making the biggest mistake of his life but that he had to do it! I wonder how much they tell them about what it would be like before the show, I know BB have the talk of doom but do they do this with the Apprentice?
On the other hand, he did leave it a bit late in the day to get a replacement so that was a bit bad.
Maybe he was told and thought he could do it until he had been there a couple of days and realised how much he was missing his family! He had already filmed his opening sequence chatter so they had probably already been away from home for a few days.
I have no problem with his reasons for walking and he does seem like he would have been a goodun. I did laugh when Rufus was saying did he just remember his family the night before!