There is inherent problem with Aron and his harem: none of the girls and women love and cares about him a little. Why? Because if they love and care about him they would buy him out from slavery as this option is possible in every existing slave state in history, except for criminals turned slaves.
I can understand intention of author to keep MC as slave as long as possible, but he can use as a plot device a false accusation of mc in crime for example.