You can try and lease your land to a wireless phone carrier for them to put a cell tower up.  

We also preach an open communication channel with our tenants  we also installed wireless water detectors under every sink, the washer, and the boiler room which have been worth their weight in gold because they are super obnoxious which forces tenants to deal with it right away, and it notifies us on our phones when one goes off so we can text directly to open the conversation.

Somehow the hackers disabled my wireless network adapter but they were still able to connect and change my pricing spreadsheets, so I spent all day fixing them and protected them.

Revenue from wireless carriers for hosting 5G small cell sites2.

Installing 2 - 3 of these should cost less than $250.Wireless alarm system - These days you can get a fairly comprehensive alarm system for well under $500.

Not the cheap wireless systems from Sam's, wireless water heater, wireless thermostats.I still use a lock box and it has never failed me.

We also use the combo smoke/carbon wireless interconnected ones so when one goes off they all go off on tenant turns and new acquisitions and we use the non wireless ones for existing units, but still the combo smoke/carbon.We also make sure to test them when moving in a tenant, in front of the tenant and have them sign a separate smoke detector addendum to the lease that states they alarms were working at move-in, they understand they are not to remove and they are responsible for the batteries and maintenance. 

Wireless systems are easy to install and move.

You make sure you got a diagram drawn and agreed  to and signed in writing  that :1) you got one main running though the building, then one SINGLE water entrance per unit. the single entrance needs to be accessible in a closet (or pantry or cabinet under a sink, just not in the hot attic) 2) these meters are wireless, draw their power off the running water so that part is easy... in theory but doing the readings is a pain on your own.

Now they have options for wireless, so that is less of a concern. 4.