When i say LBS doing it…i didnt mean all of it. On both my last two builds the bb needed facing, so got the bb installed along with the cranks. It just seemed easier and it was done while i talked to the mechanic/owner…he now lends me the odd tool so having him do little things does have its advantages in the long run.
My latest build will be done by me…bar having a couple of coloured spokes changed on my wheels as i have no clue about wheels and not taking any chances. 🙂
And as for 2 hours…try doing it a house with no room to swing a cat and an infant screaming with either colic or teething and wife that hates all things bike related! The only 2 hours i get a week is actually to go cycling!