Uhm, rent 3 VPS's and buy a couple of runescape bots - put it into work, with 5+ bots per VPS, bot them up to 40 attack 99 strength 1 defence and then sell them - You'll make at least 30$ per account.
About 25% of the accounts are going to get banned, so you'll make about 600$ a month, at the least.(That is after taking out the fee's for VPS and bots.)
What I do, I make more then enough from it...
Then, after you made a little on it...put it in stocks ?