in capitalism, there are zero limitations on property. Human slavery is labor capital in capitalism (private prisons, 13th amendment). You can own people and their labor in capitalism. By you, I mean you mr nougat, with enough capital, can own immigrants today to sell their indentured servitude right this very second in these united states of america and capitalism will not only let you do it, it will reward you with government protection in the form of profit, and the cops and guards and laws to protect YOUR humans.
Or are you saying thats not feasible within the framework of capitalism and I am just not getting it?
If you are not getting it, maybe you are too poor and lower class to realize how little capital you have in capitalism that you cannot fathom how much capital means power in a capitalist society, a society in which capital is authority.