Interesting note to mention. As of the gold listed in the picture is shown to be from 2 days ago, with 2 hours of playtime (maybe an extra 30 minutes added, forget exactly how long I grinded since then) I am now up to 1.8 million gold. So revising my gold grinding in the previous posts, one can usually get between 500,000-600,000 gold in 60-70 minutes.