We have a small farm, currently we raise pigs, cows, turkeys and chickens for eggs. We have Angus cows, went to the local auction and picked up 2 healthy but quite thin cows (steer and heifer) so they were dirt cheap.
Then.... we made friends with a guy who owns 5 Angus cows and a Hereford bull. We arranged to pasture his cows in exchange for use of his bull (yup, I'm a backyard breeder whose expecting a "mutt" come April!). One of his cows died leaving an orphan steer. In exchange for me feeding and caring for it, he's giving me half at butcher time. Angus and Hereford are really calm quiet. I go out every morning to feed the orphan and they all come to visit. The bull likes his ears rubbed. The couple times we've had cows get out, I shook a grain bucket and they came right on back.
Now pigs are the easiest to raise for a bit of extra $$$. Buy a bunch of cheap piglets at auction, use a creep feeder and a 55gal water barrel with a nipple and you only have to actually DO something every few days. They are extremely neat and clean. They never poop in their house, only in one corner of the pen, so I can clean up in less than 5mins, throw a 50lb bag of feed into the creep feeder, top off the water barrel and done!