In Australia its way more common for landlords to use propert management companies.

They charge about 5%, the tenant rings them and says "The hot water is out" they ring me and say "You need to authorise us to send a plumber" I say "Ok" they ring one of their go-to plumbers who attends super fast because they dont want to lose the repeat business of a property manager who has 100 properties to look after and they fix it at a fair rate because if they dont the property manager will find a new plumber.

When I was renting out my first house (had to move for work for a few years) I couldnt get an electrician for my own house as fast and as cheap as my property manager could get one for my tenants.