On the house, I too initially pondered that he may have selected it based on features and maybe he did MOO...but if he did then he apparently didn't, at least on the night of the murders (Per PCA), take advantage of one of the house's most useful features for someone stalking the inhabitants and wanting to remain undetected IMO...the tree line at the back...which IMO provided a space to quietly observe the house, windows lights MOO, from cover. MOO. Others have posted that it was cold, and ofcourse, we can't know anything about whether BK made a toss up between comfort level and caution. Just MOO