My end game ship for Eve is the Chimera carrier. But that's a long long way off not only in terms of skills to learn, but money. At least a billion ISK just to get the ship. With my current wallet of 85 million and no easy money earners I often wonder how I will get the cash to get the ship once I even have the skills for it.
Of course, the skills alone starting today would take 126 days just to sit in it, and that doesn't include any of the skills required for the mods or fancy drones/fighters. But its not unfeasible that I could be ready to fly one and fly it properly in a year even with side trips to interceptors, transport ships, etc.
The money on the other hand... my earning potential so far has been best when either ratting in 9GLY or trading in Placid. Mission running level IIIs has been profitable but not as lucrative as I hoped. I'm waiting to see what the higher quality level III agents do for me but right now the missions take long enough so that I can't do a bunch of them quickly and the bounties are not stellar. Basically the effort does not equal the reward. Maybe level IV is the answer? I don't know. Maybe complex running is the answer. Again, no idea.
Ultimately though I had a new idea. Character sales. Specifically my alt industrial character who once I get the mining skills up could probably fetch most if not all of the 1 billion herself. I've been toying with the idea for a while so we'll see how it goes over the next couple weeks once she can fly a Retriever.