Greenhouse partitions and soil vs pot questions

I put my 12 by 12 up by myself, took a while as I was also sorting out newly built raised bed at the same time.
Getting the end upright was a bit tricky, but managed with a friendly fence post, in the neighbours fence, some binder twine and a step ladder.
The main roof beam was managed in the same way, with the addition of a stool to stand on.
Glazing was fine and the other hard bit was getting the glazed window lights in position.