Just had a thought.
If you are buying a house, you have a survey. But not on the roof/chimney stack?
That's likely to be the most costly thing to repair.
It occurs to me that if I buy a drone with a video camera, not that much money, I could do a video survey of the roof/chimney stack for not too much. Easy money & I get to play with a drone!
Not done much research, just an idea. Any thoughts?