Works through the existing landlines to up to 16  units from a device in the basement or wherever the phones connect. 

Your scenario isn't dissimilar to other investors trying to acquire these buildings, and in some cases, the brokers would fantasize the OM and make the proforma figures look amazing. 

I am conducting research to investigate how technology can be utilised for streamlining the due diligence and buying process from the comfort of our homes/offices.I’d like to leave you with this question and kindly request your thoughts:Would you consider submitting an offer for a property located in another part of the world without physically viewing the property, but instead using tools such as your devices to conduct virtual tours and local representatives to validate the property?

We could have moved into an apartment for the short term, but we're cheap frugal so that didn't factor in.During much of this flip time, my husband was a high-income consultant for a government medical device.

I am not an expert but there should be a IOT device that you can install by the furnace  by your self to know which tenant is the issue. 

Here is the link: https://www.verizonwireless.com/connected-devices/...As for Wifi cameras I like the YI home cameras that you can get on Amazon.

@Bob Woelfel, haven't done this before but a couple ideas come to mind:1) Utilize the GPS device on their phones and let them know you're able to see where they are.

@Kyle Dutson I have the same issue with my mobile devices.

@Marcia Maynard please read my last post I was on a mobile device and couldn't tag you.  

And, that code could be entered into the device at the entry door which would unlock the door allowing access to their rental.