Offering people a service of housing, without having them to deal with the complexities of property purchase, financing, transaction costs, maintenance and whatnot comes with it.
How dare they!
How dare they!
That profit is parasitically extracted. No 'work' was done to actually get it - it's merely the privilege that having money gives you.
Some landlords do do the work themselves, which simply means that not all of the income derived from their properties is parasitically extracted - only ~80%.
Probably not. You'll barely break even. It's not as lucrative as you think it is.
Get real.