Something to consider.How to: install an inexpensive wood floor that looks like a million dollars
DIY all natural hardwood floor restorer makes floors shine like new and eliminates scratches & scuffs. Non-toxic, DIY cleaner safe for kids & pets. (Bottle Decoration For Kids)
The Harper House
HOME: DIY Plywood floor = Inexpensive paintable floor. A pinner said "Did this in our house.we just put the sheets of plywood down and routed out grooves.then some stain and poly.its been ten years and still looks great and we love it.
Installing Hardwood Flooring Over Concrete : How-To : DIY Network