It's a fair project removing the posts on the kop, but, there's a lot of work that could be done behind it, at any point of the season, as it would only disrupt the 20 or so cars that park there. Depending on how the decided to support the roof, which I would guess a cantilever affair, that could be done in the off season surely??
Obviously the calculations for the weights over area would need to be done before any work anyway.
They could start by filling in the corner, that would atleast allow for structural support before the bigger job???