The are super simple self install items that you can put in your house when its vacant and when you rent the house you put the alarm components back in the box, put it back on your closet shelf, go onto your phone app and stop the monitoring service until the house is empty and your portable security system is back in place. 

Hi Kenneth, While I do not have much experience in tax delinquent properties, I come from a banking background and as soon as my customers get behind on their loan payments, we begin monitoring their taxes too.

You can also find some multi unit on FMLS but I’ve been monitoring most of them are duplexes.

I'll be doing a house hack on a duplex and until I fill it monitoring the entire house. 

It's a key component of any investment due diligence and one that, regrettably, is often only reviewed by investors when things do go south, by which time it's too late to realize they have no remedies.Put another way; freedom from decision making and management responsibilities does not abdicate responsibility from monitoring and controlling the process.

It does use Z wave protocol for connection to the hub, in my case a Wink 2 for monitoring remotely and to update the codes from anywhere etc.

One might also note that to successfully invest in other "passive" income like multi-fam, syndication, or stock market, there is still some level of effort for the passive investor: attending investor meetings, scouting deals, managing the managers, arranging financing, monitoring monthly cash-flow and market reports, etc. 

Ask some local REI clubs (if you live close to some) or even post in your home state forum here on Bigger Pockets (they have pretty good state forums here that many local people monitor). 

Luckily, the property was just inside of the USC patrol zone, a zone set up by the university that also pays for a private police force to monitor it, along with the LAPD.

What is expected by lenders in terms of monitoring existing or future PGs which would have a claim on the same (personal) assets?