We did pigs. Just bought some weaners from leftover show pigs and then raised them to butcher weight. took like 4 to 5 months IIRC. (that's 40lbs to 230lbs)
We didn't try to breed them to start, I'd suggest you not either.

1. pigs are smart. They will get out if you don't build a heck of a shelter. hog panels (not cattle panels BTW), T posts every 4 feet and some people even use hot wire.
2. You can get lots of stuff (feeders, waterers, even hog huts) on craigslist, take a look,they are always on there.
3. If a pig is off it's feed (not eating) it's sick and you better figure it out.
4. pigs are strong as hell (and smart, see #1), make the pens strong.
5. pigs don't sweat, they need some way to keep cool, that's why they lounge around in mud/water. They needs LOTS of cool water.
6. don't name them. trust me on this. it's damn hard if they are named.
7. give them something to do. bowling balls work, pumpkins are hilarious. (they bat it around for a while and then all of a sudden it breaks open "hey, this is food, FOOD" and there it goes)
8. they eat everything. Find a local restaurants that has some stuff that is still good, but not good enough to sell. (bread, etc), keeps your food bill down.

bacon is good.