The establishing process may take him a while, but he's dedicated: "As the hills turn into holes / I fill them with gold." A user on Genius suggests this means that when his efforts are flattened, he finds ways to turn failure into success. Whether true or no, putting gold in the holes instead of mining it out of them may seem odd. Perhaps he is trying to save his money and his success from complete failure by hiding it away. Or perhaps doing this is his way of becoming like the "[h]eavy stones" that "[f]ear no weather"; he's got reserves of gold and accomplishment backing up his next risks.