You couldn't obviously if you had no other back ups. I personally prefer to have all my back ups in at least two locations.
So, how would you resist a $5 wrench attack? Willpower?
And how long did it take your family to be alerted to the break in?
Not too long. Maybe a couple of hours. It is an area where there are many vacation homes. Of middle class people let's say, not ultra-rich. Some have home alarms, but those have also been broken into. The modus operandi is that they make sure no one is home, enter, and look for something of value to take, but they do it quickly. I would say that in 5 or 10 minutes they are gone.
I think we agree that the best protection against attempts to steal your bitcoins is that no one knows you have them.