Re: A parade of spaceships...
I've also seen some people build aircraft-like models by drawing a cross-section, use push/pull to where you want the next section, then modify that face to what you need. Rinse/Repeat until you have your entire hull.
Yes, that's the simplest way to do it, but it can get real challenging when the one cross-section doesn't really serve because it might need to be drastically changed as you go forward.
STAR TREK: 1964-1991, 2013-?