This is a serious discussion, so no messing around please.
Need a rain cover, has to be roughly 7m wide, and be able to extend to 100m long.
I need it to be elevated (roughly 0.5m-1m), preferably using supports with wheels.
Ideally i should be able to vary the support heights, so that one side can be higher/lower than the other.
it can't be fixed to anything, its got to be maneuverable.
if possible have a gutter system, nothing too complex, just something to keep the water from dripping off the sides