If you end up submetering your water, I use Kamstrup, about $180 a pop just for the meter but they are real quality tangible product with a 40 year capacitor, need to find a dealer near you. meters are wireless and get a charge from the water moving through them . picks up the signal well to my PC. 

Others use wireless automated deadbolts.

Their hit rates are less than 40% and they don't provide which numbers are wireless or landlines.

I’m about 9 hours away so i rely on smart systems- WiFi thermostats(ecobee), door locks(encode), mesh WiFi system(deco), WiFi water sensors, WiFi light switches(so i can leave a light on for late arrivals), i use wireless solar camera's which are probably the least fancy but get the job done and i only check them when there are issues or looking at the weather. 

Those lowe's receipts get crazy after a while. forget the neat receipts. if they are advertising it on TV, you know it's junk.http://www.amazon.com/Fujitsu-ScanSnap-Wireless-Mo...this thing is amazing.

There are several skip tracing companies that can assist you getting the numbers (landline, wireless and even email addresses) for the property owners.

Find one that has flexible pricing options without log term costly memberships, excellent customer service, and can provide wireless/landline numbers AND email options.

WE use PTLevel Wireless tank level monitor...

A work around though is to email pics to phone numbers using the wireless carriers unique email address for each phone number.

They're wireless now, so you can read the usage remotely (assuming you can get a WiFi connection).