Motor - 6 rpm A/C motor - $8 shipped from china.
Base - Scrap Oak sprayed with poly - Free
Support Arm - Scrap Aluminum from work, cut and bent to shaped on our shear and brake. - Free
Wheel Base - Plastic circular electric box cover - $1.10
Wheel Foam - Sheet of 6mm stuff from micheal's - $1
Eltrical Cord - Some cheay I had laying around - Free
Switch - A/C inline switch from Home Depot $4
Screws I had in my screw cup.
Total - $15 and change