Either his boyhood team 49ers or his current home, Rams. I’ve said for a few years that’s where he would play out his final years.
I do think he loves the Bills, Fans, etc. But hey if you’re pegula and you want him to stay for the long term, don’t stop with making him the highest paid QB. Give him a % of the team. Sure why not, be the first ownership to give the franchise QB a slice of the Bills and he will be involved indefinitely.