For those wondering about building a cresting machine, here was my breakdown for parts/cost:

Platform: Old shelf taken down during renovation: $0
Sewing machine motor at repair shop: $10
(mine actually had an intact mounting bracket that I just bent straight and used drywall screws to mount it.)
Surgical tubing, 1 foot @ 1.99/foot: $1.99
Vblock made from scrap knotty pine: $0
Testors model paints: $3.99
Fine brush: $1.99
Spray paint: $0.95
2 sheets of sandpaper $ 0.59 ea: $1.18
Rubber furniture feet: $2.99
Foam strip for vibration dampening from A/C $0
Rheostat for speed control $6.00

Total cost to get started: $29.09
Total time to build mine 45 minutes (including getting the vice out of the garage and bringing it downstairs, straightening out the bracket, ensuring that the motor worked before mounting and re-reading the rheostat wiring instructions so that I didn't smoke anything.)

Other tools you will need:
Pliers for pulling nocks (needlenose)
Blade for stripping (boxcutter)
Joint compound bucket to sit on.
Something to stick the arrows into to dry, I'm using a triangular cardboard shipping box I got my superslams in.

I hope I can get really good at arrow building. I can definitely see myself doing this for a living! DARE TO DREAM!