Last year for the game we stayed by the airport, and used Uber/Lyft to get to Broadway bar area and stadium. Hotels were just crazy($300+ per night) within walking distance of Broadway. Even with Uber, we saved a ton of money that was used instead for eating/drinking.
On a related note, I've been to about 10 or so cities to see the Bills play, and Nashville was the most fun I've had. Hope to go back in 2021 if the game isn't too late in the season. This year...not happening.