Hello OwnedCore,
So you'll probably want to stack up on some gold before next expansion hits, it might be a bit costy to do the new things in the expansion.
I've been using this method to farm gold couple of times. And this is by far the best way to make gold IMO farming in D3. We all know you need 500 hours play time to find a 1bil item in Inferno. And when you've just started playing again recently or playing for the first time it's quite hard to get anywhere in Inferno, you're stuck on low MP and dying alot.
So, what you need is a level 60 char, preferably max magic find to make it more efficient.
You want to stack as much movement speed, and make your spec based on fast resource regeneration and movements. Buy cheap 60 items with attack speed, crit maybe something else like Magic find if you lack some. You´ll get each piece rather cheap, so you're not wasting any money anyways. Also you'd want a high attacks per second weapon to make it even more efficient.
So you want to pick the quest The Black Soulstone on Monster Power 10 on normal. You start the game and you rush through Dahlgur Oasis and until you reach Desolate Sands, now you want to find Vaults of the Assassin. Enter it and clear it, now teleport back to down and follow the routine: Sewers of Caldeum > Black Canyon Mines > Path to the Oasis(You can do the sewers at the Waypoint in Oasis it's fast and easy) and you'll want to do the Forgotten Depths dungeon in Oasis. This shouldn´t take more then a couple of minutes.
Now you want to teleport to town and make a new game, you start by going to the portal into Vault of the Assasin, clear it, then repeat the routine. It shouldn't take long to find a Leroic's Signet for you this way, and each ring goes for around 40-50mil gold and going upwards because people are stacking up before next expansion to power level a crusader, also useful for good geared people to level Paragon levels fast before expansion.
This is on EU, not sure if the ring might be cheaper/more expensive on US, but should be rather equal.
It shouldn't be hard to get a few hundred millions or perhaps a few billion gold this way easily before next expansion.
Don't be poor! Get your hands on a few rings and get some real gold!