If that was his goal he would have found another woman during his journey. He did run into an entire fighting ring with shinobi that have KKG. I also think that he had a son in mind when having an heir.
You seem to think you know how Sasuke's mind works.
I'm sorry buddy but Sasuke isn't that deep or calculating.
Tbh I assume the reason he married Sakura was to atone for what he did to her.
He felt like he owed her something, and knowing Sakura only wanted him to love her he decided he'd give it a try.
But now he really does love her or he wouldn't have blew into her.
OT: You also have this perception of Sasuke that's driven by what you want him to be like.
What you're implying is that Sasuke isn't incapable of love, and that is wrong af.
Many times Sasuke insinuated the only reason he found no reason to love was because he had a goal to pursue and tangling with love and affairs of the human heart would only distract him.
Which is just why Sasuke could never understand Sakura's feelings and saw them as annoying. That part of Sasuke was being held down if you could say for a greater purpose. Which was avenging his brother and reviving the clan.
But after the war, and having reconciled with himself and whatever, he could love again and Sakura was always there for him, so maybe he had an epiphany and realized that Sakura actually loved him.
So I don't understand how you think that Sasuke had secret motives with having a child with Sakura because if he did, Sakura would no way be even an option.
She doesn't have anything genetic to offer, and if Sarada inherits her knack at genjutsu it'll be by sheer luck.