I have noticed that we haven't seen any sign of visits between Caleb and other housemates. When he started posting all the lonely looking sad pictures I wondered about that, but doesn't he live pretty far away from the others? And he obviously is having money issues so he can't be flying to meet up with Drew or whomever for parties or charity things or whatever? And maybe thats why he over stayed his welcome at Matts, that he knew once he went home, His BB experience was well and truly over because no one else is in his area and he can't fly back to visit...
How do we know he overstayed anyway? Did Matt post about it? Seems to me Caleb is doing the best he can, working, doing the plumbing biz, getting the dog, taking care of his family. He has a beach house, thats pretty cool. For all we know he does have friends. But the buzz of going on Big Brother, that is a big deal in his life and its quite a let down to go back to his normal routine. Like has been said, he had higher expectations than this.