I think there are a lot of 60 acre sites near the city that, with a bit of imagination, would be suitable for a football ground.
For instance, there is a lot of space alongside the M6 - we would only need a 150 yard wide strip about a mile long to get 60 acres. Allowing for a few shops and whatnot at the ends and spectators and access at the sides, it would be perfectly possible to have a pitch that conformed in area to the regulations.
It might have to be 10 yards wide and 1,000 yards long, which is outside of the regulations, but we all know how flexible they can be.
Edit: not likely to see many goalkeepers scoring on a pitch like that.