You will probably need to be 70 to do this. First solo scholomance all the way up to the last boss. He's the one who locks you in the rooms until you kill the mobs. Anyways, as you may know, these mobs have extremely low health. Here are the steps.
1. Aggro the boss and attack him until he ports you
2. He should glitch and walk through the gate of the room before it opens.
3. After about 5 seconds he will port you to another room.
4. The mobs from the last room you were in will now be following him into the room you are currently in.
5. After a very short time he should port you again and steps 2-4 will repeat but with even more mobs following him.
6. These mobs drop about 10 silver, after you gather up about 30 of them, AOE them down and loot them.
7. You can do this as much as you want, thus, giving you unlimited money very easily.