When I heard about the speeder cost, I stopped training my crew skills too. I'm lvl 28 now, and I never actually resumed training them. It's kind of sad, because until that point, I was really excited to get additional companions just for tradeskills.
I'm actually afraid to go nuts and resume skilling up, because I may need the money for something. I'm sitting on 60k, I have an inventory upgrade available for 20k, and 3 companions who could amass tons of stuff.
The reason I've been getting by with only 1 inventory upgrade is probably that I've stopped tradeskilling altogether. Kind of a lose-lose, unless I actually start using the GTN.