If you need cheap kitchen backsplash ideas, I have one idea that’s cheaper than any of the others I’ve seen: Fiber-Reinforced Plastic, or FRP. With FRP, you can knock out a backsplash with less than $50 worth of materials.
It’s not the best looking material but it’s cheap, easy to work with, and readily available. It will do a good job for you until you can get something better. It’s both cheaper and more durable than many cheap kitchen backsplash ideas I see elsewhere. And since I said ideas, I’ll share one more idea I like a little less, but it’s clever.