An e30 325is was the first car I turned into a track car, they are great cars and fairly easy to work on, but as some said parts can be hard to find. But if you stick to ebay and forums you can find pretty much any used part with not too much trouble. I think its a great idea, you can learn about stuff in a classroom but you really can't learn anything until you experience it hands on. Keep us posted on what you're doing, GL!
Here's a shot of her getting a tire rotation at road america, only picture I could find on my computer
