Just done some work on my UK rental house after it had been rented out continuously for 5 years and it worked out:
Roof (new membrane and replacing/resitting tiles) 3k
All rooms repainted (3 beds, lounge, kitchen, bathroom and hallway) – 1.5k
New fusebox/electrical work to meet current standards – 1.5k
Fireplace renovation, installing new electric fireplace – 0.5k
New carpets (3 bedrooms & Lounge) – 1k
New Kitchen flooring – 0.5k
Cleaning out the garage/gardens (and other small odd job stuff) – 0.5k
Lucky to have two friends to do most of the work, who I paid the going rate to, or project manage the pro’s bought in.
A house is an investment, whether you live in it or rent it out, so its worth putting some effort in to keep it in good condition, specifically the rook, water and electrical parts.