I've asked this question before, but even if Smart gets offered good (but not crazy) money, why wouldn't we resign him, play out the next year with him and Rozier, and then decide who to keep? Unless Smart tanks we could still move him and then re-sign Rozier, if we wanted to.
Worst case scenario if Smart has a bad year or gets hurt, we'd have to attach our 1st rounder to move him. But we could still do it, and we would have had a full year with both those guys.
And people have talked about there not being enough minutes, but with Hayward and Irving coming back from major injuries, and Smart getting hurt periodically, and the other normal injury risks, I would see Rozier getting plenty of minutes even as our "4th guard."