Yes, it's almost "stealth" [8D]
Hmm, building, I don't know, but the Buildstage 3 is no big deal, I was afraid that it would take "forever" to do the steps, but at Euro 600,- even I can keep a decent "hour rate"
I think even Mark managed to build his the first one in a "few" days, so can't be too long
Jokes aside, I think a couple of weeks, when the "buildstage 3" steps have been completed, I think is is almost the same as Ali 1.9m build thread.
One thing is sure, there is PLENTY room inside the plane !