I think you could do this with no problem if you have the room. Pigs are easy to raise. I think they are easier than cows. We have milk cows so there is just more work with them. Do you have the extra land?
The one thing to be aware of when raising pigs is that they can force their way out of many enclosures. Pigs are sort of like living bulldozers. They are very powerful, and can force open gates if they are not secured very well. They are also great diggers and can dig under fences. Ask me how I know this.
I've looked into it, but I don't have the space since we already have chickens and goats. I think they're a bit tougher on the land than horses and cows, but I could be wrong. You can get quite a bit of meat off of one pig, and they can eat a lot of kitchen scraps, so they don't seem expensive to raise.