I helped a friend build a stand that was 12' tall. He insisted on putting the legs, cross braces, and platform frame all together then hauling it down on a trailer.
We like to never got that thing stood up. It was a very hot day and we just about tore it up getting it upright and it just about tore us up doing it.
I bet! Mine is only 8 foot tall. We assembled it on site. My wife wanted it 10 feet tall but after we pushed it upright I think she was glad I talked her outta that. Even after sitting in a chair your heads still well over 10 feet in the air. Which is more than enough for me.
Also 8 feet is much easier to work on it in general. Siding, roof, etc...