I believe they targeted Von from the beginning. Especially if he reached out to them.
Both team got through the initial free agent frenzy window, to the period you reach out to your own more. LA tried, Buffalo was in his ear. Buffalo was his choice based on money and Josh.
And yes, McKissic was not the deciding factor. You don’t clear cap space and change philosophy to target a single guy that quickly. McKissics contract $$$ had no impact on the Bills ability to sign Von. Plenty of players to approach on a restructure.