I don't think the goats would choose to be ressurected if you killed them, but who knows.
Now, if they didn't mind being killed and mostly eaten, and you had a friend that was a truly inept jeweler (i.e. appraise that tiny piece of diamond dust as being worth however many GP it needs to be), then it would be viable.
Personally, I'd just go with casting Stone to Flesh on boulders to feed my family. After all, 70 cubic feet of meat--with a pinch of dirt and drop of blood as the only things you have to invest--is a lot[/i]...about 600 pounds, depending on the specific kind of inert, lifeless flesh that the spell makes.