It appears newer triplexes require sprinklers and Siamese water connectors out front, building wide fire alarms etc. 

You could do water alarms if you think the risk of flooding remains. 

This pattern of nothing after wiring money usually gives you the alarm bells, but I didn't see it as such (for various reasons) so decided to play the "wait and see" game.Literally nothing for months (beyond the standard marketing emails). 

An alarm system in this neighborhood (C class, C-) seems above and beyond. 

I can set alarms on temp and humidity and be notified if out of temp/humidity range.

The main problems (3 major ones) you will run into will be the high cost of material & labor (be very choosing with your next handy guy or contractor-they an either make you or break you), people breaking into your home (get tan alarm system for SURE!!

If I understand the laws correctly, I need to add smoke alarms to each bedroom.

After doing my own inspection and found dry rot even though there was an inspection done before that did not call it out, I negotiated it down to $293,400 and $13,500 in seller paid closing costs and switched it to an FHA 203k rehab loan.Thought I would take advantage and do some value add so I included a conversion from office to bedrooms (just a closet and smoke alarm), Ductless AC, an extension of the carport to allow 2 large cars each unit, fenced yards, paint, cabinet paint, Shower tiles, ect.

@Nicholas L. were you required by Vacant Express to have a burglar alarm and or fire alarm hardwired or WIFI'ed to a security response service  

In my personal opinion I do not believe that someone would cut costs and want to rehab this place to bandaid the problem of leaks on the took which goes down into the walls and light fixtures, plus an unfished bathroom-like area that's exposed sewer drain and plumbing, someone couldn't just temp fix it to make it livable because I believe its unsafe the air quality is bad when the furnace kicks on it sets off smoke alarms so they leave it off.....