Oh wow, I didn't know that was possible. How many hours (approx) would it take an experienced player to raise that much cash?
It depends a lot on what method you use. I hear that people flying incursions can make a hundred million an hour (sometimes more, sometimes less), likewise I know of people who earn over a billion a day through buying and selling, depending on the market and what they're trading in.
heh yeah, would it be possible for me to get that much before the trial runs out?
As above, it's possible, but generally much harder for a new character. In terms of active earnings, stuff that requires that you have certain skills / ships to perform whatever activity it is, then it can be hard to reach a level within the trial period that will be sufficient to earn enough for a P.L.E.X. each month. Passive avenues can be far less demanding on character skill levels, but significantly more demanding on assets, for example, trading. To make money through trading you tend to need money first (so you can buy expensive ships for low, and sell them high, thus earning a reasonable profit.)
My advice to people is generally: It IS possible to make enough ISK in the trial period... however, I don't think the work required and the dedication would really be all that fun. So I'd go into the game expecting to pay for a month or two's subscription at least, before you're self sufficient.
That's my opinion at least