Pros -
1. compared to other farm stock, you get more pigs per birth and they are among the fastest to slaughter weight.
2. If you are small scale, you can displace a lot of purchased feed with kitchen scraps/garden wastes/found food bread stores/restaurants/groceries etc
3. friendly pigs are a joy to be around, and will make you laugh
4. bacon
5. ham
6. tenderloin
7. bacon again
8. as long as you have a pully or loader, it is fairly easy to home butcher a 200 - 350 lb pig and it will fit in your chest freezer
9. can be pen raised in a small space or pasture raised to help offset feed costs
Cons -
1. they smell bad if you don't give them a large area or a lot of carbonaceous material to soak up urine & manure.
2. They will eat you if given the chance and are not properly trained.
3. if the neighbors want to make trouble for you and the law is not on your side, pigs are probably the worst animal to have
4.
I'm not creative enough today. I'll let others add to this list