Thats my House!, back in post #8.
If you have any questions ask away. I built it out of galvanised steel tube and clamps. The common name for them is Kee clamps but I used a knock-off made by Alvin Industrial.
ALVIN INDUSTRIAL SALES LTD. AIS klamps, casters, racking, plastic end caps, rotalock, key klamp, winches AIS Ltd.
It was not cheap, but I wanted it to look good and last a long time.