I agree with Angelic to rotate the pitch is a major development with the ground being out of action for more than a close season.
Either if the hire rite and surrounding land is owned, build a new ground similar to how he millennium stadium was build. Virtually next door then turning the excisting ground into the car park when completed.
Or if redevelop the ground, they would have to rehouse away fans into Atyeo whilst constructing the first stand the Wedlocks. Similar to when they built the Atyeo but on a bigger scale moving away fans from the old open end . Once that is done rehouse the Williams into new Wedlocks then rebuild Williams, back with the changing rooms and everything else!
If this is how they are going to do it, I'm glad I get a season ticket as we could be looking at lot of sell outs till completed.
My suggestion would be go to the council and agree to have the park, build a stadium there and turn AG into a new park, kids away from main roads etc