Very cute GR! Thanks for asking :) I am actually pretty knowleageable in architectural styles and drawing.
It's just the pretentious CCAD version (that's what my profs taught me). A person who makes drawing is a draughtsperson, a drafter.
Just like a bartender who draws a draft beer. Or a draft animal who pulls a load.
A draft just generally seems to mean something that pulls something towards something else. An artist draws up a vision of a porch-to-be. An ox pulls a low. The lady at St. James pulls me a draft beer and is also a nice person. You follow? :)
it was a serious question about the spelling. I thing draftsperson is equally correct. I'm a draughtsman at the bar though. I think draught is proper in that context. but draft is more common. I mean, no one orders a bud draught, right?
The 'you' in sketchup comment was directed at the OP, for design purposes.