I’m not sure if domestication is viable; if it was, the Amerindians would’ve done it already, odds are at least some tribes tried. I’m saying this because they’ve been hunting the capybaras since forever, a lot of them used to be nomads (livestock is great when you’re a nomad, it’s basically a mobile food reserve), and the ones in the Andes did domesticate a related species (guinea pigs).

(Plus they have a nasty habit of eating their own poop.)