I have 3 trailers on 16'X6'6'' Ifor williams trailer with ramps and de-mountable sides, I also have a Ifor williams 10'x5' tipping trailer, Ifor Williams trailers aren't the most expensive trailer in the UK but imo they are the best , I think they are available in OZ now.
I'll get some pics tomorrow, pitch black out there now. But i'll get some links and show you what they look like, my tipper is 3 years old and the 16' multi purpose is 4 months old, the great thing about Ifor Williams trailers is they are so versatile, a high sided trailer now, 10 mins latter a stripped down flat bed!
Both are a gross weight of 3.5 tons or 3500kg and both weigh around a ton or 1000kg maybe a little under
here's what my tipper looks like or did when it was all shiney and new
Ifor Williams Trailers - Product Range - TT105