For an amount of about 500 million ISK you can purchase one PLEX (Pilot License EXtension) which can either be transported in your ship to another location (not a great idea) or used to add 30 days game time to your account.
|A 30 day fix|
This is awesome! Well maybe, but it becomes easier as you and your character grow in skill.
On average, rounded up, their is 30.5 days per month. So to make 500 million ISK per month, just to pay for the PLEX you need to make, rounded up, 17 million ISK per day, every day of the month.
Now don't forget this will only pay for the PLEX, not the ships, ammo, etc you'll need.
We have several ways this ISK can be obtained.
Firstly the good old ratting, shooting the red crosses that turn up at asteroid belts in nearly every system of the game. In high security space this doesn't earn much, however as you progress into more dangerous space the rewards go way up, but so do the risks.
|Born to be destroyed|
Missions are another way, especially once you reach the level 4 security missions. You could easily make the ISK here doing mission after mission but saying it's rather repetitive is an understatement.
Incursions, aka hitting the Sansha piggy bank, is also a way to make ISK from NPC's, though for the big dollars a small group, and some decent ships are required.
Manufacturing can also be utilised to try and make some money but you'd better break out the spreadsheet program as competition is fierce, especially near the trade hubs like Jita, Amarr, etc.
The same goes for the good old market games of buying low and selling high.
Good luck beating the market bots.
Mining has been the red headed step child of Eve Online for quite a while now, but with the potential buff incoming with Inferno 1.2 we may see a slight resurgence. Mining is for those people who think a Morris Minor is just too damn fast and that Sloths are hard to follow. Some money can be made from mining but inserting a piece of leather between your eye ball and socket (Isaac Newton actually did this for "lols") would be more fun.
Research agents are an old school way to make some ISK, once you have the rep that is. They will sell you for a very minimal price a type of data core, which changes from agent to agent, which you can then sell on the open market. The great thing about research agents is how passive they are, you can just drop in once a month, have your way with them, pickup your data cores, leave a small amount of money on the dresser and leave.
|Leave a deposit once a month|
Once you enter null sec with a decent corporation and space you can then utilise anomalies which ramps up the ISK gathering, though as you're in null sec your risks are higher also.
I'll tell you about the time I had a 100 million battlecruiser destroyed on everyday of one week.
Eventually...when I'm done with therapy.
Are their other ways to make ISK in Eve Online?
However the above is some of the more accessible ways for a character either solo or in a corp. Some other methods are for corp or alliance wealth creation which will be out of your reach for quite a while.