You don't need a $5,000 battlestation to start streaming. Here is the setup I would build again with a $1,000 budget, in the order I would buy it.
1. Microphone first
Viewers forgive a blurry camera. They leave over bad audio. A good USB mic on a boom arm is the best money you will spend.
2. Light before camera
One soft key light in front of you makes a cheap webcam look expensive. Put it at eye level, slightly to the side.
3. A webcam you can trust
1080p at 30 frames is plenty. Upgrade to a real camera later, when the channel pays for it.
4. Comfort last, but don't skip it
A headset you can wear for hours and a chair that doesn't hurt. Long streams are a marathon.
Tip
Want my scenes, alerts and pre-stream checklist? They're in the Stream Starter Kit.