In my opinion it is the fact that this story idea says so much about the nature of our society, gender, superficiality, objectification? (for both male and female characters to some degree) that makes it interesting.? The characters are all flawed in ways that really cut to the bone for the point our society is at at the moment.

For this reason, it will be extremely delicate to tell, and I agree with dpg that so far the pitching has been a little indelicate – but this is not a discouragement. These things are hard. My advice is take the feedback and make sure you know the moral arch of the main character and can tell the story in a way that makes them likeable.

I agree with the other commenters that the meat of the story is still absent. “Sets out to convince them to share a house together” is the wrong action. “Sets out to make things right” is better, and I think the story then involves the protagonist learning about their perspectives and what he needs to do in order to make things right with them.

His motivation is a determination not to be a bad father to his children, perhaps because of his own absent father. He realises that he can’t be a good father (to either a son or a daughter) without fixing his own emotional problems and learning to treat other people in his life with respect.