Motors Ordered

I just ordered two wheelchair motors with 12" wheels from eBay for a total of $135 ,including shipping. Not bad deal, because these motors are very powerful( can carry over 200 pounds). Due to the strength of these motors I might add a small step for me to stand on and then I would add a joystick to control the robot manually . The motors will probably come in next week and the base will be built by the second week of August. Maybe even sooner if the motors arrive early.
I'm also going to buy a deep-cycle wheelchair battery from eBay, or perhaps I can find a substitute for that battery. Up on top is a quick 3D model I drew of the base( in Google SketchUp)