Assembling the subfloor went rather quickly because all the wood was cut at the same time. There wasn't much measuring to do, so assembly quickly proceeded the cutting. The walls on the other hand have many more studs at various lengths.
In order to keep construction moving along quickly, I decided to cut all the studs for the entire structure before beginning the assembly process. The assembled walls will not fit under my parents car port, so once the first wall goes up, the trailer will be exposed to the elements. This means that I need to work fast to get it water-resistant as soon as the first wall goes up.
By cutting all the studs to length and organizing them in the trailer by wall, assembly should progress very quickly. The downside to this concept is that I will spend a few days cutting lumber and not seeing any progress happen.
When friends ask to see a picture of the construction, it looks like a trailer with a pile of lumber on it. Not really what they were expecting when they ask to see a picture of the tiny house under construction.
An important trick that I have done which avoids any confusion with the cut lumber and off-cuts of lumber is I write the measured length of the stud on the end grain. Before I cut a piece of wood, I make sure there is no writing on it. This will also make assembly go faster. I will not need to measure anything as the plans tell me what length of board goes where, and the number on the end grain is the length identifying that board.
This actually saved me from re-cutting a long piece of wood into something smaller. I grabbed a rather long piece of wood thinking it was a long off-cut, and before I cut it smaller, I noticed it said 69.5 on the end, signifying that I don't want to cut that board! When assembly time had come, I would have been very frustrated trying to find this missing cut piece; thus slowing down the assembly process.