@Luvacuppatea
In a similar position. I’ve left the heating on a very low setting, hopefully enough to prevent any burst pipes, damp etc.. A neighbour has a key and pops her head around the door once a week to make sure all is ok. Is there anyone local to your property who could keep an eye on it OP?
Oh, a moment of sadness for me, about 'the neighbour'.
My elderly aunt was 'the neighbour'. She and her DH had bought the house decades before, in a small fishing village. The whole 8 house terrace was occupied, bar one. She could look out of her top window and see the working harbour, and the lights twinkling of a night.
In her 70s, she was widowed. This was in the early 2000s. The entire terrace was, by then, holiday homes. She sobbed to my mum on the phone one winter saying she'd looked out one night over the rooftops to the harbour, and couldn't see a single domestic light on.
Her key rack was a mass of 'spare keys' that second home owners had asked her to hold. After winter storms, she'd anxiously scan the roofs she could see with binoculars and call local tradesmen out to fix fallen tiles, etc.
So, if you're okay with the destruction if a local community with your second homes, employ a company to check out your house.
Don't rely on local residents.