Will the next residents understand that the drip-watering system 'blows out' sometimes, and needs fixing? How did I understand that? I've never lived in a house with a drip-watering system. But I heard these noises (high-pitched weeeeeee! as the air gets pushed out of the line; sound of water through pipes even though I hadn't turned a tap on), I wondered what it was, I investigated, I figured out it was the watering system.
And then one day those noises changed. Interesting. Investigate! Oh, one of the connectors has come loose. I should fix that.
Next year, the drip-watering system just doesn't work. Nothing happens. I remember when it turned on I could hear the solenoid tapping in and out. Now, nothing. A bit of figuring out later and I realise it froze in winter. The tap was full of water, it closed its relay, night came, it froze, it expanded. Damn. I bought a new unit and now I drain it come late autumn.
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This plus one hundred other things.
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So can I tell all this to the incoming residents, whomever they might be? I thought to write a 'house manual'. Maybe knock up a little website.
But, no. I can't. Because this is what we refer to as 'common sense'. Can I teach a stranger common sense? Alas.
Invent a thing that can teach an adult common sense and there's your next unicorn.