Leon is a strong cold and serious,courageous business man. He always succeed and was the pride of his family and Lisa one. So put 350k for buy an alive young organ of a donor (and kill him by the way) was not a problem to him. Until he see that more the days pass more the half of the face of his lovely wife turn into an other face. He will do everything for save her but it will not work. He will have anyway to see this person. This person who appropriates his wife's body. A real horror to him.