The answer is, successfully regionalize/partner with Toronto. This quote from Erie County Executive Chris Collins says it all.
“I’m supportive of anything we need to do to keep the Bills in Western New York,” Collins said Monday, endorsing the team’s strategy to strengthen its appeal in southern Ontario. The key to keeping the Bills in Western New York is making the team more valuable for whomever the owner ends up being,” he said.
It's either more games in Toronto, or bye bye Bills. Short of a miraculous economic turnaround in WNY, there is no other quick way of infusing cash into the franchise except via Toronto.