This very comforting device alerts you if the noise level is above a threshold. 

I am stumped on this one as to what devices etc would I have to meet this requirement/?

Leaving the folks to their own devices to figure things out, with empty wallets and full credit cards.

Currently landlord pays for all utilities, is a system/product/device that can be installed to the water meter that tracks the usage of water through each unit so I would be able to bill the tenants separately?

I went into the bedrooms and don't notice the sloping floors so much just by 'feel' and admittedly haven't put any measuring device like a level to it. 

I have seen too much of how bad of jobs contracts can do when left to their own devices.  

I just purchased my first Short Term rental and am looking into Smart Home Devices.

Whichever are combined into a single device.

If the remediation devices intrude significantly into the livable space, that will probably detract from value. 

Hello, We don't currently have a STR, but posting here because many STR use these kinds of devices.