So in a mad rush I did manage to finish the arena build in time for Shire Con. There is still a lot to do including filling the bleachers and editor's box with spectators and hanging some banners and laurels etc, but it is at a stage where you can comfortably play a match on it. Not bad for a week and a half's work.
The doors arrived with only 2 days to go, cut by a friend on his laser printer, and it took me some time to figure out how I could make them function. In the end I simply glued a kebab stick at the hinge end of the door at then anchored the stick between the floor of the editor's box and the arena sand, without gluing of course.
The rest of the build went really smoothly after the doors. I affixed all the railings and posts in place and after a lick of paint to the arena proper, started planning the portico of the editor's box. The pantile roof construction was done using plastic fridge liner, that I have already detailed here.