I've got the solution right in my basement: SoWoT (S'load of Wildebeest on Treadmills). Since I've already done all the developmental work, I can tell you that a ratio of 23 wildebeest to 11 treadmills works best. If you discount the cost of wildebeest feed, treadmill maintenance, wildebeest damage, and the inconvenience of 14 times a day floor cleanups, all your energy will be free. I will impart some expertise at no cost to you. First, don't get a mixed gender herd. They don't seem very responsive to sex ed classes. Second, don't get an all male herd.....basement damage out the old wazoo to say the least. An all female herd is the way to go. I'll tell you how to get those ladies moving on the treadmill and how to wire your house if you subscribe to my to my "BPNL (Beest Power News Letter)."