Can I make one for 20 bucks? Sure, since I already have the drill for other reasons, I can make one for free.

And you are forgetting about the battery and the charger that you have to buy for a starter...I already have both with the drill.

Torque bad? Speed good? No problem...all drills have a high speed setting and it's very fast.

The only thing I will need is some kind of rubber bung to attach to a screw driver bit to turn the spinner.

As for liking the car thing more...maybe. Racing cars is intense in a way only a highly competetive venture can be. However, I've flown park flyers, and it's an exhilirating feeling (when the wind is not blowing them over some fence I then have to climb). I don't think I'll ever give it up.