Some of this is likely background noise.

The board does not get direct emails from other home owners, we pay a manager to do that.Outside of making as much noise as possible a german shepherd would be a better investment to keep the landscaper off your wall than making a lawyer rich.

Cheap money.My worry with multi family are noise issues or disagreements between tenants.

Ask them to contact you if they see strangers poking around or hear any suspicious noises.

There was also numerous unexplained noises throughout the house. 

We both mainly are not happy with the "daily grind".

We both mainly are not happy with the "daily grind".

I don't think your lease says he cannot have visitors set outside and see for yourself don't take your neighbors word for it, they might have an axe to grind with the subject.Joe Gore

I have to comment that those shared heating are a curse both for smells and noise.

We are not doing anything extreme, but being able to merge multiple videos into one or removing some background noise, etc. will be the biggest things.