Oh so you kind of want the big ham-hock hands and tree-trunk forearms? I'd probably advise you to get into a lot of grip type stuff, a lot of maybe sledge-hammer stuff, I don't know...maybe construction/demolition work. My uncle is the quintessential model for the ham-hock hands and trunk arms, but I also know he's done a lot of different jobs in the past. The most logical I would see would be construction.
Maybe you can start observing some of their movements and mimick the exercises? Like go around cutting pvc pipes for grip (awesome). Or if you wanna waste money, you could just buy one of those grip exercisers that martial arts stores sell.
Lol, I hope this helped.