Last night we were joking that maybe my father in law can give drive through flu shots.

When we resell and calculate the annual IRR it's usually pretty phenomenal.

You approach their kids and are accused of tampering with the old folks....I see 2 options: Either get even closer with them - in a genuine way, don't just do it out of greed (IMO) or just go straight business mode and approach them with a generous offer based on them moving when THEY feel ready to move....You stand the risk of irritating someone no matter what you do, but on the other hand, the only way to get a great deal sometimes is to walk out on that limb and jump....

Also, it's not uncommon for tenants to complain about things only after they run into difficulties themselves, e.g. being delinquent or late on rent, as  way to somehow "justify" or balance out their transgressions.As irritating as it is the way  they chose to complain, you have to consider their complaints to determine if they are legitimate or just overblown and unreasonable.

It’s certainly irritating, but one of those things that’s simply not worth dwelling on.

At first it started with simple irritation on the siblings and mother siblings part, but it’s only escalated from there.

You put some box on it to prevent turn-off, tenant shuts off a circuit breaker that feeds that system electricity.Tenant + irrigation = Landlord + irritation :)

Even then, pets can get sick (from agedness, stomach "flu", bladder infection, etc.).

It kind of irritated me further because they told me they cover the first six months of maintenance (not something they put in writing but just a nice gesture they make).

Make sure the flu and chimney are clear.