The right answer is that there are more than one. But what you want is a business program with pre-established systems that you can plug & go with. It needs to be inexpensive for beginners, yet potentially very lucrative. Lastly, it needs to be the kind of set-up that everyone can understand and work with.
My suggestion for everyone desiring these qualities is to take a look at something called The Secret Stash Factory. This is about as complete as a turn-key online business gets. They've thought of everything, including systems for incorporating your favorite autoresponder, such as TrafficWave. On top of that, it's flexible in a way that allows you to scale the program up and down - depending upon your budget, skills and/or needs. You're paid directly (no middle-man) and you can do this business from anywhere on earth.
Does this sound like what you've looking for?
If so, then at least take a look. It's a lot of information to absorb (true), but that's because so much of the work has already been done and provided for you. If you're looking for an online business that has it all, then maybe The Secret Stash Factory is right for you.