How to make gold as a wizard:
1. Get to Act I in Inferno and choose the beginning of the quest Fallen Angel
2. Equip as much gold find gear as possible. Don't worry about gear stats
3. Spec out with:
Archon - Improved Archon
Energy Armor - Force Armor
Hydra - Venom Hydra
Familiar - Sparkflint
Magic Weapon - Force Weapon
Teleport - Wormhole
Glass Cannon
4. Take the Templar as your follower and put gold find on him too.
5. When you enter the game, go straight to the waypoint portal. Do not go near Leah at all
6. Take the portal to the Old Ruins and run West until you get to the Checkpoint outside Old Tristam.
7. Teleport four times West and you should be right at the basement where Sarkoth resides
8. If the basement is closed, TP and quit. Resume and you will be at the checkpoint again. Go back to step 7.
9. If the basement is open, head on in.
10. Run to, but not through the door where the Quill Fiends are. Drop your hydra on Sarkoth. Pop Archon and disintegrate him. The splash should kill his minions immediately.
11. Grab loot. TP to town. Resume and restart at step 7.
If you go near Leah, a checkpoint will trigger and you won't spawn right near the basement. So if you need to go to the Blacksmith, make sure you run below the portal before going over. Use the merchant to the west to sell trash. You can access your stash, but make sure you're directly underneath it.
If you're fully dedicated to it, you can run him around 60-80 times an hour. He appears roughly half the time, but don't get discouraged if there are streaks of 5 or 6 times he isn't there. The base gold is around 2,500 per run. So with 200% gold find, expect 7,500 gold or so. You will always get at least one blue, usually more. They are almost always vendor food, but Level 60 items can be salvaged at the Blacksmith and the materials auctioned off for about 2,500 gold per. You usually get 1-2 gems as well.
Buckle down and do this for a few hours and you'll have a few million gold in you pocket.
Oh, and if it wasn't obvious, anything will one-shot you without gear on, so run Force Armor when teleporting to the basement. You may sometimes find yourself on top of a zombie of find one standing in front of the basement door. Just ignore it and run past, taking the hit. Every once in a while you'll get unlucky and land in a pack and get ganked, but what's life without risks? If there's a pack in front of the door and you cannot run through. Just dump the hydra and then archon to blow them away. Archon will last plenty long to float in and blast Sarkoth. It will just take a little longer because you won't have the hydra too.