Please recommend an affordable camera for action shots

I want to start photographing skateboarders. I've been skating since 1996 and even though I skate now at 32 years old, I want more out of it. I know that what's affordable is relative to one's income. I'm very low-income.

I don't know anything about cameras. I know that I'll need something with a fast shutter, and something that can take quick bursts. I suppose it would need good image stabilization as well. Digital SLR's are expensive, are those my only options?