The smaller of my 2 sheds is 13 x 10 x 6m.
About 8 cars worth but with a horse float, numerous trailers and other sh*t only room for 1 Cobra
2 of us put it up in a week or so.
Just a big mecano set, renting a scissor lift made standing the trusses and sheeting it a breeze. Saved us a couple of grand in installation costs.