There are a lot of threads you can search for in this forum regarding build times. It seems to vary a lot, from 1200 to about 2500 hours to my recollection. My build, with all the options, was 2200 hours; but I am slow and methodical, first time builder. I'll have to say that none of it was difficult, just a lot to do. The manual leads you thru the steps with all info and parts listed on the same page, no jumping around that you describe.