I think you mean billion.
To answer your question, Ralph already ensured that the Bills would be in Buffalo for a long time by signing a ten-year lease with a ridiculous penalty for breaking it. He knew the Pegulas were interested in buying the team, had the capital to do it, and had personal incentive to keep them in Buffalo. They can finance a stadium without public funds if they think it's worth it, and they're smart enough to know that they can't price the tickets out of reach of the average fan.
Therefore, I'd prefer that he donated it to the community as a whole. Football is entertainment. A region needs more than an NFL team in order to thrive.