Sources on this?

Oh it’s not as bad as your making it. My water sensors were only about $20 - $30 shipped and I mean if you’re going to make an order you might as well get that $30 z wave extender so the fence gate sensors I spent $40 on have good coverage. I pair those with about $100 in temperature and humidity sensors for the attic, garage and freezers. I mean I needed to justify the SDR I picked up for like $45 you know. My $20 garage opener has also made life that much simpler. Wait how much have I spent already?