Hi,
Depending on your age, assuming your are a teenager or in your 20's I would suggest you find any job, just to save money and invest in this. You need a powerful computer, you need to pay for internet, rent, etc etc, so try to carefully analyze your budget and find a way to make some cuts so that you can afford the $30, because on a monthly budget, $30 is like a meal, so I am confident you can start saving a couple of dollars here and there and in a couple of weeks, you have your $30 easy.
I used to wash dishes in shitty, dirty, junky bars until 3 in the morning to afford what I wanted, use to take boring jobs at packing factory in 12 hours shifts until I could find the job of my dreams. That was really shitty and depressing to be honest, but looking back, I don't regret it, it made it even more blatant that I really wanted to be a realtime 3d dev, as I was working these jobs...
Xmas is coming, instead of asking for socks, toys or else ask for playmaker! I used to ask for computing books on 3ds max, AutoCad, photoshop, flash programming when I was young, it's far more useful than a meaningless gift that will take the dust in a drawer...
Bye,
Jean