Sunday Ticket is a big waste of money in these times. I dropped it 8 years ago and dropped Directv altogether in Dec of last year, had it as long as the drought. Got a Roku tv and the Sling mid package for 1/4 of the money with the same stuff, and a lot more.
For bills/Sabres games I watch online for free, and it can be conveyed to your tv if you want to. Sometimes the games are on national tv and we try a few times a year to go here: http://www.brandonbillsbackers.com/ to check out the game too. Was unable to go to the Bills Backers this last year though due to !@#$ing hurricane Irma.
In short, it's out there... just do a little exploring. I hope Directv goes out of business, and soon... what a ripoff.