He would never reach the amounts of emperors, probably.
He isn't getting the amount related to leading a big fleet like Luffy (part of his current status comes from his figure as the head of other famous pirates like Cavendish or Bartolomeo), first of all.
He wouldn't have ever grown as much as now. While he may be strong-willed, he needs someone like Luffy to push him and take even bigger risks, otherwise he would still be in East Blue.
I'd say he'd be around the same amount of other top Supernovas because he clearly lacks Luffy's charisma and spirit and, on top of that, isn't as strong as him. It of course depends on what bounty Mihawk ever gets, anyways, but as of now I fail to see him reaching the highest prices we've seen so far.
"Normally", which doesn't apply to monsters because they aren't normal. The proper way to read that dialogue is that Zoro won't need two years to heal because he is a superhuman, not that he was nerfed throughout the first half of the series.