You could always stay out of town and head in on the tram. The line to the velodrome is open now, so you could potentially stay anywhere on the map below, and just jump on a tram that drops you off right outside
Maybe check the hotels on Salford Quays, or Anywhere on the way out to Bury or Oldham
I’ve just looked on booking.com and its telling me a Double room in Bury Premier Inn is £69, its right next to the Tram Station, so you’re 30 minutes away
Ibis Budget FTW. No frills has been recently refurbed about 1 minute walk from the tram line. Suffers a bit from road noise but that was the last time I was there and it was really warm so the window was open. My mate recommends the Trafford Cricket Club Hotel.