Around here about $40.00 per round bale. Now if you are going to harvest your own hay, you will need a baler, a hay rake, a hay mower (not a bush hog), and a lot larger tractor 60 HP would be a start. Don't forget the hay trailers, truck and forklift on tractor to load bales.
You may be getting in over your head on this deal. You'd probably need 80 acres to break even. Now if you feed your own cattle you might get by with less acres, maybe 60 acres. You'll need a couple donkeys to protect the newborn calves, the ability to go out in any weather to pull a calf from it's mother due to breach or other issue.
Have a good day!