You can't go wrong with any of them and they are even having a Black Friday/Cyber Monday Deal going on.

is surveillance legal on a rental?

But just about anything you were looking to view in a distant city that you were maintaining, surveilling, or looking to buy.In a property next to one of mine, someone is doing a "scrape", and I want to make sure they don't damage my property and that they respect the property border, etc.  

Yeah, if he want's to feel safe that I'm not robbing him, he can buy two wireless surveillance cameras for $100 and point them at each door.

I can make someone else responsible with all kinds of legalese and threats but unless I install CC surveillance in the homes none of it is going to matter in the practical sense.It gets even stickier in multi-family homes, which is our primary bread and butter.

I work in the cyber security industry so I am actually able to work from home.

If I have surplus power in Phoenix Arizona, its not getting to a house in San Fran.Of course we need to improve the cyber security of our grid. 

The Army Cyber Command recently moved to Fort Gordon in Augusta, and the NSA has established major operations there, as well.

hi,
a tenant called us that someone went in to their apartment while they were not home (might be her boy friend but he denies it) and she wants us to check the cameras, and send the picture /videos to her,  
so i h...

Get an alarm system.Also, consider installing dummy video cameras (unless you want to spring for an actual video surveillance system).