Mostly fair points, but figured I'd clarify a bit.

"You've got a property sitting empty for most of the year, driving up property values, so you can have a jolly holiday."

My grandmother (the homeowner) lives there more than 6 months each year. She spends the rest of her time in a retirement community.

It's a town with <500 people that swells 10x during summer months, there is very low demand besides vacation homes due to lack of nearby schools, healthcare, etc.

We have two maintenance people and one cleaner from the local community that we partner with; it is extremely common to have these "old school" side gigs up there as it is such a vacation-driven community.