Now a couple moving from a city to a rural area needs to learn to do this work or not move to a village. The population decline in most places makes it clear that availability of services is only going to get worse.
In economic theory, that's an obvious business opportunity.
In the real world.., might you know what barriers a small roofing repair business would face in rural Japan?
My roof was damaged in heavy snowfall this winter and I needed to wait 3 months to get it repaired. And I'm not even really in a rural area. The guy who did the repairs looked to be in his 60s - I don't think many young people are looking to get into this business.
I think most contractors would do better in more densely populated areas where lots of new construction is happening.
That's what life in an economically declining/dying area is like.