how big does my shop need to be?

[Lilred]

I'd keep in mind, that when yer buildin it, keep your measurements in 4's or 8's.
You save ALOT of buildin materials that way. For example, somethin 24 ft long would need exactly 6 sheets of osb er whatever yer gonna sheath it with, instead of 25' where you'd be usin an extra piece just fer that extra foot. Makes you 1 less truss too, er 2 rafters. Not to mention floors and joists.
Just a thought...