That's cheaper than my solution, which was to make the status of the door locks, garage doors, furnace, etc, all verifiable via home automation. And with backups for some of them, like auto-closing garage doors. I used to have a problem where I'd get a half mile from home and have to turn around and verify the garage doors were in fact closed. Never once did I return to find them open. But now I can just pull it up on the phone.

Pictures is a cheaper way of accomplishing that, not a bad idea.