@Paul Santos You will only need the name registration with the state, Articles of Organization and the EIN to open a bank account. Most banks won't require an operating agreement, but some do. The operating agreement is something that can be amended at any point.
As others here have mentioned, you can go online and find lots of documents and you can set up a shell of an LLC through the ACC.
What most of you don't see is how many people screw this up, who get into issues all the time because they don't have solid contracts or agreements in place, who don't have an operating agreement when they needed it most.
It has everything to do with your tolerance for risk, the game you are playing and what price you are willing to pay when things go south. You can't play in the game of real estate investing and think you'll never have issues with partners, tenants, lenders, and other creditors that want to get at your money or potential money. Play the game right and you will be ok. Play it haphazardly and you'll find out the hard way what you should have done.
I take calls every day from people who "winged" it and who are coming to me to bail the out and because they didn't do things the right way, or things didn't go the way they thought it would. If it hasn't happened to you, give it time.
Can LLCs be pierced? (meaning they offered no protection) Yes. Can attorneys overcomplicate a legal structure to create "asset protection" and cause more administrative headaches than it may be worth or and increase your tax obligations? Yes. Does that mean that you shouldn't have a solid legal plan in place? No.
Anyone who tells you that an LLC is a waste of time is not telling you the full story. Are they a waste of time under certain circumstances? Yes, they can be. Can they provide great protection over a myriad of circumstances and help you keep a lot of money? Yes. They should be accompanied by insurance as well. This does not mean that insurance can cover everything either. We have all heard of insurance companies that deny claims.
There is a balance here. Don't go paying an attorney thousands of dollars to put something together for you, but don't trust some scrap document on the interweb to solve your issues or think you can patch things together. Don't hesitate to talk to a real estate and asset protection attorney that is also an investor to find out where that balance is and make a plan that fits both your strategy and budget. It is less expensive to plan than fail to plan. That, I can assure you.