I always turn the water off when we're away for anything more than a night or two. I've always been anal about it.
We live in a cul de sac and in the cold winter in 2011 (iirc) a neighbour asked me to help her, she was checking on another who spends months away had opened the door and found a burst in the loft caused damage to the room below and all the flooring on the ground floor (concrete floors meant it spread)
I went into my lift and the tank had some ice floating in the heating expansion tank. To this day they still have a duvet as secondary insulation.
*loft
Just read the title relates to rentals, I have some rentals and personally I'm not too bothered about automatic notification with those. Tenants are quick to let me know about other bits, I'm sure I'd hear in good time. If they are damaged then that's an insurance issue imo.