Another thing is the amount of time and energy invested into acquiring, renovation, maintenance and improvement of the property.
Financially any of those, especially market crash can ruin you for life - how do you want to price this massive risk in rental price?
Ever tried to buy a property? For mortals getting mortgage, its such a stressful experience even for simplest type - obtaining already existing and equipped flat, that it easily breaks relationships and marriages.
I understand the tenant point of view to try to pay as little as possible and have as big choice as possible, I am also in that camp, but there is other side (and I don't mean some super rich or people inheriting big properties by being lucky with birth).
Building equity on a property backed by a mortgage is such a slow process that the only way to make profit (in my real estate market) is to eek out a thin margin every month and cross your fingers nothing breaks.
A property investment, like any investment asset, is a bundle of risks as well as rewards. Yes, you as the owner take on the risk of things like market crashes, insurance and repairs but you also own an expensive asset which you can sell at any time (a renter cannot). You need to deal with the risks and rewards of a property like you would any other asset.
As for pricing, the market does that for you.
When it goes wrong, it fails catastrophically.
That is to say, the variance of slumlording and poker arr probably equal :)
That depends on the terms of the lease.