I put together a new set of gear last night, and I didn't spend more than 10k on any one item. In the end I spent 55k gold and with no follower bonuses my stats are 4376 Armor, 432 Resist All, 45k HP, 26K DPS, with 985 LOH, and 2.5 LS. I have some bids in on better items, and I think I could increase those stats given some time. Almost all of these items were bought with Bids as opposed to BINs. Buying these so cheap means that you should be able to sell them at no loss when you do find upgrades and hopefully you'll net some gold in the sale.
The build I'm using is Zombie Dogs: Leeching Beasts, Gargantuan: Restless Giant, Spirit Walk: Honored Guest, Zombie Charger: Zombie Bears, Soul Harvest: Soul to Waste, Plague of Toads: Rain of Toads. Passives are Jungle Fortitude, Spirit Vessel, and Vision Quest.
This is not the most efficient farming setup and you will die occasionally, but you should have no problem advancing through Act 3 with this gear/ability setup. This is a great starting point, and it will keep you alive as you work your way through the game. Higher DPS is nice, but I've found that lower DPS and not dying is way more efficient than high DPS with frequent deaths. You can start here, and upgrade one piece at a time as you advance through the game.
You can check out the gear/setup @ http://i.imgur.com/cMJX0.jpg
On the above image I added the price that I paid for each item. You can use this as a guideline when you're looking for items.
Feel free to add me in game if you have any questions about this approach. If anyone wants this set of gear let me know.