Build it across the street...KO ECC South.
80,000 seat, open-air, built in a similar design to the current stadium except it isn't built into the ground.
Have a couple huge "lighted Bills logos" adorned to the concrete endzone structures on each side. That would look pretty cool at night.
And get a team and coaching staff, and new owner. Implode da Ralphie and have that as gorgeous surface parking.