What causes George to change his mind and allow Candy to get involved in their dream of owning a house?

George allows Candy to become part of the dream of "livin' offa the fatta the lan'" in many ways because Candy is much like them. He is a person that perhaps much of society finds little use for and has disregarded in many ways; he has outlived his usefulness in the eyes of some. Candy, like George and Lennie, dreams of place where he will not be told what to do, where he can be himself, and work on his own terms.