This small compilation was done in ~30 minutes, 45 max.
If you're talking about the shipset, well, yeah, that's been at least several days of work doing approx. 3 hours (I guess) a day making these models, so I think at least somewhere in the vicinity of 10 hours.
Thank Cthulhu for the fact that DoGA's so easy to use!
edit: 'Nother update; a 1024x768 JPEG rendition of the 128x128 bitmap of the Colony Ship. One of my personal favorites; what you think aboot de colony dome?