Horse Powered Treadmill Log Splitter
You can get more economical than this. It runs on water and hay.
Unlike wind and solar energy, a horse treadmill provides energy on demand – without relying on the sun shinning or the wind blowing. Energy can be stored as compressed air without environmental impact or as electricity by charging batteries. Process firewood by powering a saw and log splitter with the horse treadmill. Cool your drinks by making ice for your ice box, or make 5 gallons of ice cream for your next party. The Horse Treadmill will astonish your quests with its simple design while showing your energy independence and environmental consciousness AND ITS GOOD FOR THE HORSE
Here is another angle:
