3-4 more seasons of good YFS production and Kamara will have a strong chance of HOF induction.
For his career, I think he’d need to reach 9-10k rushing yards, 7-9k receiving yards, and 110-140 total TDs to have strong consideration.
If the HOF voters views his career as an elite satellite back, and not just as a rusher, then he’ll have a great shot after a few more productive seasons.