I took your advice. I googled it. The answer is totally different. The Bills are now on the hook for over a billion.
https://www.google.com/search?q=break+down+the+financing+for+the+new+highmark+stadium&rlz=1C1CHBF_enUS946US946&oq=break+down+the+financing+for+the+new+highmark+stadium&gs_lcrp=EgZjaHJvbWUyBggAEEUYOTIHCAEQIRigATIHCAIQIRigATIHCAMQIRigATIHCAQQIRirAjIHCAUQIRirAjIHCAYQIRifBTIHCAcQIRifBTIHCAgQIRifBTIHCAkQIRifBdIBCTEwMDUxajBqN6gCCLACAfEFIjfLc2Qp8C8&sourceid=chrome&ie=UTF-8
The financing for the new Highmark Stadium, initially estimated at $1.4 billion, is a mix of public and private funding, with the state of New York contributing $600 million, Erie County $250 million, the NFL loaning $200 million, and the Buffalo Bills covering the remaining $350 million.
Here's a more detailed breakdown:
Total Cost:
The initial cost estimate was $1.4 billion, but has since ballooned to over $2.1 billion.
Public Funding:
New York State: $600 million.
Erie County: $250 million.
Total Public Funding: $850 million.
Private Funding:
Buffalo Bills: $350 million.
NFL: $200 million (via a G-4 loan).