Also how should I handle/document this incident of her removing a smoke and CO² alarms?

No need for alarm.

Land, labor, capital and entreprenuership are the functions of economics, each will always be in demand in any society.I don't see any alarming concern on the macro level, but the recent bust has certainly brought concerns at the micro level in many areas.

Alarm bells went off in my head, because on that 1st day there was barely any mention of this.

Unfortunately, I'm a college student for the next year which seems alarmingly useless since I'm a full time investor and do not plan on changing that once I graduate.

And, if you're concerned, using and alarm system, and or cameras would likely make you feel a bit more comfortable.

Or maybe a water alarm so it catches it right away.

Most companies stake out a place for 20-30 days.Otherwise, you may want to install motion sensors, automatic timers, an alarm system, or cameras (live or fake, but either way a deterrent).  

Red flags or alarm bells should be going off on a note where only one, or none, payments were ever made on a loan.

Owning a security company, I put an alarm and camera in the property to monitor arrival/departure time as well as a camera to view general progress.