A couple of years ago I had a sewer line dug up where the camera showed a blockage.  

We’ve changed the locks already and I’ve ordered an additional three security cameras that we will be setting up in the next few days.

I went to check on the property today, and there are surveillance cameras at the front door, and the locks has been replaced.

Buyers still wanted their 10k septic concession in addition to the 30K lower appraisal value (despite us fixing the septic line and showing camera for proof) so we said see you later- no deal.  

I have 8 cameras in each store (1200 to 1800 sq. feet) and its not enough.  7 of the cameras are pointed towards employees and only 1 towards the public. 

I would recommend the following:Finance: Quickbooks for accounting and rent reminders with online paymentsMaintenance: Basecamp or Asana for managing work orders and maintenance.Leasing: Signnow to collect online signatures on leases, deposit to hold agreements, etc.Visuals: Wifi camera system like the Blink XT to have eyes on the exterior exits and common areas.Team:  Probably the most important is having a reliable handyman, then attorney for evictions, and specialized contractors like electrician, plumber and contractor.When we were starting out in Bridgeport, CT, this setup worked wonders!

Recruit them to help, give them some form of reward.You could install security cameras in all the common areas.

I just happened to win a small video camera at my local AZREIA meeting recently, but sadly I can't get it to work.

Call animal control and report dangerous dogs trying to attack people walking by .Document the extra people by camera , and file for eviction on breach of lease.

You might want to consider a remote ip camera built into a floodlight.