List price is $1013/month to backup one petabyte on Amazon Deep Glacier. Of course, cloud costs are always higher but that gives you an order of magnitude cost estimate for a back-this-up-we-will-never-need-to-restore-it archival copy.
Even stranger if murderers picked a place without cameras to drag a corpse around. Probably a big "oh sh*t" moment when you see the Google camera bot drive by.