The pigs need to be in confinement not pasture. They will fatten up faster. Also the pigs will destroy your pasture. Plus your pigs will eat the calves manure. So you would indirectly be eating calf manure. Not my cup of tea. Also there are diseases and parasites that can get out of control in mixed pens faster. You would need to talk to your local veterinarian for the ones common in your area.
You will need to keep an eye on your grass. The sheep will eat it down so short that the calf will not be able to get any to eat. So you will need to balance them out.
Goats and cattle work better than sheep and cattle. Sheep and cattle both eat the same types of grass. Goats eat roughages that cattle do not commonly eat. Also you do not have the wool issue with goats. The wool is just about worthless now and shearing a sheep is a dirty job. Also any burrs will make the wool even harder to do anything with it.