3-4 hours in 3ds Max. No textures + Little post work. 
Although my love for maya is fairly new, it's been more than a decade with 3ds Max and the extensiveness of this thing still amazes me. This started as a simple geometry for explaining to my class how extruding and bridging works in max, but it lead to this. So i though to render this on a bigger scale.. 
The spaceships are stock images from the net, original geometry below.