In the Imperial City, Talos district, find a house owned by a person named Dorian, it will be called "Dorian's House". Try to get him angry enough with you via threatening him. Once he has a low enough disposition (lower than 20) with him, he will ask you to leave. At this point kill him and go to loot his body. He should have around 40 gold and some other misc items. LOOT ALL THE ITEMS FIRST leaving the gold, DO NOT LOOT ALL. When you go to take the gold, it will glitch and keep allowing you to take the gold off him. Make sure he doesn't leave or alerts any of the guards and save before attempting this. After about an hour of hitting the same button, I had 150k gold.
2. Attack(Pull right Trigger)
3. Switch to inventory before attack ends(B button/red)
4. Equip any set of arrows and press A until a message, "You cannot change weapons while attacking" appears.
5. Drop Item you wish to Dupe
6. Exit Inventory and collect Duplications.
So get your most expensive weapon and wield it. Get on your horse and fast travel to either Kvatch to speak to the orc merchant, or to Silver Road in Cyrodill and speak to a merchant in green clothing.
Once you enter the barter screen, sell your equipped weapon. It will not vanish, allowing it to be sold over and over again for gold.
Do the very first spring manually. Once it is in place, do the following:
As you press over on the joystick to go to the next spring, hit the "X" button a split second after you press over. The arrow should be in between the 1st and 2nd springs as you hit "X." If done correctly, and it doesn't seem to be too difficult, you will get the lock open on the very first try. It's similar to getting the speed boost at the beginning of a Mario Kart race.