When you're buying feed it may be hard to make a profit. But if you have the money and a profit is an after thought, you could try it. I raise a couple chickens and the eggs they lay aren't near enough to cover their expenses but I keep them because I like them. Maybe look into a smaller breed of cattle that would be more of an easy keeper and require less feed.
I buy grain like corn and oats. I soak it all and add electrolytes an a ration of cotton seed meal . Im feeding half a bucket per head, and it's costing less than a dollar a day each. And bring one from birth bottle fed.6 weeks and grain ration for a year. They get up to 600 in a year. Finding grain at a decent $ is the key to profit.