I am a multi year member that has used the tools on this site frequently but haven't interacted much. 

Cozy.co and Buildium are frequently mentioned on here

They share vendor contact info frequently.

I always try to maintain my properties as frequent as possible. 

However, investors like you can and do frequently use them for both managing real estate investments and defending them from lawsuits. 

Also, I would say in my 13 yrs of owning rental (but always at a small time scale), the lower the rent and area, the more frequent the tenants turn, and the more "wear and tear" they tend to do.  

However I lived in this house a few years ago as a house hack, and I know this block tends to get the occasional/sometimes frequent drama with a select few neighbors.

Avery also has a calculator on her website, The Short Term Shop that I use frequently.

These get executed frequently in the background.

Whether the negligence took the form of allowing bad workmanship for installation, failure to replace components at the end of their useful lives, or failure to inspect frequently enough to catch failing components before they damaged neighboring properties would be irrelevant -- negligence on his part existed.He should be a good neighbor and notify his insurer, which can investigate.