I work on a poultry farm and one of the daily tasks is to gather all the dead dispose of them. We grow 45lb heavy toms and I've been putting them in a wheel barrow which is pretty hard to push once you reach about 5 birds. We have a gorilla cart which has 4 pneumatic tires and is steerable. I would like to outfit this cart with an electric motor but need some advice on what motor to use as well as how to control speed. Any input would be great. Thanks