In the UK (and I'm sure many other places in the world) rental agencies already provide the services you are describing. As a UK single-family home landlord I ask my rental agency to find me tenants, run background checks, handle deposits, rent and other finances etc. For this I pay them 5-10% of the rental income/month. They will also handle repairs etc. if I need them to and bill me accordingly. This is a great service for me as a landlord who lives abroad because it greatly reduces the amount of time I have to spend dealing with my property to maybe a couple of hours every few months.
