This is currently our biggest project. We designed everything in CAD first to settle on a design. Then we ordered and cut the steel and welded (with help from our friend Josh) it all together. We had to flip the trailer halfway through to weld the other side and our neighbour Kevin was so kind to send over his crane operator.
Then we washed, painted and wired the lights to prepare for inspection. ICBC took a long time to work through our paperwork and we had to jump through a lot of hoops but eventually we had an insurable trailer.
Next up came insulating and installing the floor and pre-assembling the walls. Once we felt like we would not get the house too wet we pulled it out of the garage and started putting the walls up with the help of our families.
Now (2020-06-21) we are almost done framing the roof and will soon be ready to sheet the walls. It's been going a lot slower than we had hoped, but things always look a lot simpler on paper.
Check out our CAD model on Onshape.