One thing not mentioned about breeding your own pigs is genetics. You could be breeding a family of heart pigs or breeding pigs that will suffer down the line from inbreeding and genetic weakness.
The reason I decided I wanted a guinea pig is because I came onto the cavy cages site, then on to guinea lynx and learned a lot about them. I didn't think I'd get one for a long time, but when we had to put our hound dog to sleep, and I was feeling really sad, so to cheer me up, my mom bought me a guinea pig.
By the way, jasper is a very cute piggie. Love his hair! :)