Interiors are important, and they are sometimes a weak point in vehicle models. Miss B, I think you're spot on about desigining the interior first, especially for spacecraft.

I sat through all 3 hard surface/car design videos and I have some thoughts about what I saw. The presenter makes the argument that nurbs are obsolete. Maybe in games and consumer 3D that is true, but I find that highly unlikely for industrial design. There is a fairly technical discussion to be had about that, but TL;DR: I think the CG Cookie guy is mistaken about that. With that being said, I liked Video 1 the best of the three. If you don't already know it, learn the Diamond. Seems very useful!

Video 2 is a sensible presentation of edge modeling using a blueprint. You can get much the same content from this Cryptonix video. Yes, I watched this one, too. This technique seems like a poor man's version of nurbs modeling, but it works. The technique is laborious. There is little discussion of modeling tires and wheels in any of these videos.

Video 3 is the one I was most interested to see and seemed the least immediately helpful. It's a demo of edge modeling without a blueprint. The idea of making a little guy out of ik bones was interesting. I may give that a go. But that video did not really deliver as much illumination as I hoped.

Enough videos for now. Time to work.