Originally Posted by TiHabanero

Been working in bike shops since 1981 and have assembled thousands of bicycles of all types. Some are easier than others. Back in the beginning it was a solid hour + to assemble a bike correctly. Wheels always needed tensioning, bearings always needed adjustment, had to route cables for brakes and Der, tape bar, and depending upon brand the brake levers and shift levers needed to be installed.
Today all that changed, thanks to Giant. They introduced assembly in 1/2 the time, and assembly went from an hour + to 30-45 minutes. It is safe to say that an experienced mechanic can adjust the hubs, headset, drive train, and wheel true (check tensioning) in 30-45 minutes. IF the bike has disc brakes another element of adjustment can be encountered, which adds time.
Tubeless will not be done until bike it paid for and requested by the purchaser.