The photo you posted of the Challenge Arena appears to be The Artillery Gym, which is large and has a mezzanine. The gym is "Building 17", and is "located south of Building 1", which is also listed as being available for hire, and is none of the 3 sheds mentioned in this thread. It looks like it's located waaayy to the north, up here, do you agree? This is the exterior, as close as I can get, showing the windows which match the interior. I think the scale of the building is misleading in your pic.Don't really think we need the attitude or the sassy comments.
However it can't be. Look at the height of that shed you're claiming? Its too high and the beams in that shed match the ones of the main house. They are the same style structure.That shed is almost the same size of the house, the challenge arena doesn't look anywhere near that big?
View attachment 55294
Another shot of the challenge arena. You can see the trusses across the top in red aren't that steep which match the smaller shed and not the profile of the other larger one. The width of this doesn't match what you're saying.