One thing I would love to do, if I had the space and zoning, would be goats. You can get male dairy goats really cheap often as not. I was going to use them for an all natural brush clearing service. Most expensive part would be transporting them to and from the job location. Wish i had heard of this when my aunt finally decided to clear out her beach houses back yard. It was fence to fence blackberry vines. Goats would have saved my dad and I some blood. 
