We were thinking of installing an ecobee so we can monitor the usage, but I was just told that the entire building has radiators. 

We are looking for a software that can tract payments (principle/interest).

@Kobe Xin is spot on, and I would even turn it around a bit, putting more pressure on you - agencies are going to be real tight bringing on new agents (my guess) for a while, as there is overhead when hanging a shingle, marketing costs, license costs, CRM and software costs, MLS costs, dues owed to the mothership (keller williams, compass,) etc.

You can probably also find a software to automate calls and leave messages for you if you're worried about time commitments.

My situation: Have a Real Estate Investment company - we do flips and have rentals - and we're a small operation, so I've not used quick books/software in the past, but this year has been a nightmare to organize, so I need to make moves to Quickbooks or some other system.

These tenants will pay a little higher rents and stay longer. to have Smart building monitoring and their own Electric vehicle charging.

We leave ours running due to network monitors for temp etc.Plus you can offer Hulu TV or do a Slingbox for streaming regular TV.

There's usually some helpful locals that monitor that page.  

Yes 3 unit requires some additional fire protections to include monitored fire alarm with pull stations, sprinkler system with FDC connection and back flow prevention, And connected smoke alarms in common area. 

I took a liking to a few posts mentioning learning trades that are profitable like software engineering that could propel someone who works hard into a new income bracket.