This is exactly right. To keep the team in Buffalo, we are talking about a $1B investment or more, depending on the new owner's share of any new stadium or major stadium upgrades. Assuming the economics can be made to work at all, it will require a much more expensive game experience for the fans. I would expect PSL's, and ticket prices at least double what they are today. This also assumes that suites will be able to be effectively marketed.
The Bills are not on the same economic plane as the rest of the NFL right now. The other owners are not at all concerned with loyalty to Buffalo. They are concerned with maximizing the value and revenue stream, in which they share, for every NFL team. Now that Ralph is gone, the last impediment to maximizing the value of the Bills franchise for the general benefit of the other 31 owners is gone.
Mr. Wilson held back this rising tide for a long time, and for that we owe him. Whatever happens from here on out, he did his part. From now on the other stakeholders in the Buffalo Bills will need to step up their game. The State and County will need to be firmly committed. Our US Senators and Congressmen will need to engage. For that they will look to the political support of the people - are people demanding it? Are they willing to pay for it in terms of extra fees, taxes, etc? Are they willing to be vocal about their support? Finally, the fans will need to continue to support the franchise. A half empty stadium even once per year will be a convincing argument for moving the team.
If all these things come together, then the Bills may very well be secure for the long term. If not, enjoy it while it lasts. Either way, in my opinion, Mr. Wilson's legacy is secure. He did his part.