Well, you need to go cheap?
Twice, I've salvaged a hardwood floor out of another house. It takes some prep work, and it'll be broken in from day one (that's called "worn" if you
don't like it, or "distressed" if you
do), but weighing the results vs. the time and effort, they've been two of the best home projects I've ever done. It's just a matter of finding somebody tearing one out, and asking them, "Hey, if you're throwing that away, can I have it?"
Here's photos.
First, the BEFORE of the older job. That was vinyl tile over OSB over planks. So we just sawed through the vinyl and OSB at the same time.
And the after. That's my friend and my wife, but neither likes their face floating around the internet, and hey, you're here to see the floor, right?
The floor is jatoba, a higher-end South American wood. It was all going in the dumpster, so I saved it.
Here's the newer one, in our current house. Before, carpet over particleboard over sleepers on
concrete. After, oak over sleepers on concrete.
I tried lots of methods for getting the staples out of the backside of the boards, and this is definitely the best. A cutting disc in an angle grinder will buzz them off just below the surface, so they don't leave a bump:
Hope that helps!
Mike