Depends on skill. Where I live it looks like someone lost their home (I guess through job loss etc) before it was finished. Right when framing would've started

Depends on skill. Where I live it looks like someone lost their home (I guess through job loss etc) before it was finished. Right when framing would've started. The lumber was already delivered including all the roof trusses. The only thing actually standing was the concrete basement walls, I-beams and flooring. Those parts were done quite fast as well. Then, for a very long time nothing happened. The people I saw there once, looking at everything I never saw again. But then, couple months later, always in the evenings, a single guy could be seen building walls on the floor and putting them up one by one and soon enough there was Typar looking at us. The only other people I saw there helping was one time when he was putting up the roof trusses. He did all the roofing (plywood and roof tiles) himself. The last roof tiles actually went on literally a day before the first snow. I bet he worked construction for a living anyway but it shows that it is definitely possible solo. Sure, a framing crew puts up a wall in no time but with a few simple tricks anyone can put up a wall in sections all by themselves.