Grammaretto, when I to have roofer earlier this year. Quite minor work on the roof of the house - ridge tiles had become loose and some were broken, the one I chose did as you say. Took photos up there and then showed exactly what the problem(s) were, and then further photos when they had carried out the work. Pleased I had that done, was just a week before the private survey by my purchasers, and the surveyor used binoculars to look up at the roof, would have spotted those broken tiles had they not been repaired!!!
I was actually thinking of how much I spent on maintenance just this calendar year on the house, - having the stairs, landing, hall painted early on, repairs to roof, drain (I thought it was just a connection on a downpipe that was loose, when they came, it was discovered that it was actually the drain that was totally and completely blocked. Then I also paid for a (lady) gardener to come monthly for a couple of hours, window cleaner fortnightly, urgent call-out to my boiler maintenance man.
Taking all these into account I am now very much in pocket in this flat - the annual maintenance charge I now pay is low and also covers my boiler/heating maintenance, and all my water bills. No worries about roofs, drains, garden etc. Self cleaning windows. No wonder I am so much more relaxed now - there always seemed to be something I was concerned about in the house - and it was in pretty good nick, but at nearly 90 years old obviously was in continuing need of something needing to be dione.