It was evident that Eddie and Bill had bumps in the road in their professional relationship. Just look at Bill after 10 years of being with the 49ers and he got really old looking really quick.
I have never seen an owner since that would invest so much into a sports franchise to obtain the pinnacle of success. He was truly one of the greatest owners in league history. An owner that would spend whatever it took to win in a time in the NFL when that was possible.