Any Animal In The World As A Pet

I've always wanted to have Capybaras, I'm very fond of guinea pigs and a capybara is very much like a gigantic guinea pig. I think they would make good pets in the right circumstances, they are reasonably intelligent and can be trained and are not high maintenance pets if things are set up right
If not Capybaras I would like to have a whole herd of guinea pigs able to roam free in a huge yard without the fear of predation.