@Lucas Carl You are allowed to as long as it is disclosed (https://www.airbnb.com/help/article/887/what-are-airbnbs-rules-about-security-cameras-and-other-recording-devices-in-listings). 

The advantage is no monthly fee, but it is not cloud based so the images are stored at the device.

I figure I could put some type of language in place in the roommate agreement to turn off/unplug any unused devices or appliances or ask specific screening questions, but I was wondering if anyone ever dealt with something like this.

Works with a ton of home automation devices.

I’ve been looking at virtual concierge service that works with an echo or home device to do something familiar. 

I tried 50 and once a second device was connected, It was done.

Another option is tear out any damaged material and ALL carpet and then see if you can get a place like ServPro to come in and mitigate the odor, they have ways and devices that pretty much fumigate the building and introduce a deodorizer to the building, not sure they can/will do anything for cat odor but it would never hurt to ask, they are a nationwide company and specialize in smoke/fire damage remediation. 

Does anyone know if you can have multiple devices use one log in? 

There are many now, but what I thought worked was finding the right level of simplicity, as not every employee or sub early on was that techno savvy or had the same ease of OS compatibility on their mobile devices.

My wife and I support device members any way that we can.