Estate agent friend does a rental book. Does mean a lot of work, and a lot of ad hoc repairs on various things, mostly plumbing, doors and window repairs, but also replacing electrical things and checking before letting that every single socket and lamp works, and is documented as such. Has meant I am getting pretty experienced as a plumber, and am buying a lot of PEX pipe, plus a lot of digging out of drains and replacing broken subsoil pipe as well, plus replacing century old rotted out steel pipe. Painting and plaster work as well, along with gates, garages and fences.