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.
Cheap flooring DIY idea using ply wood cut the same width and 3 different lengths, then attaching them to the floor, giving them a light sand down, and staining them with water based stain to make a beautiful wood floor for cheap!But would it work?
A Newbie's Guide to Plywood Plank Flooring: Prepping and Laying the Boards - Shark Tails Part 1 another very good DIY On plank floors. GOod info on sanding the boards a nice before and after shot of that.
Just Floored! 15 Totally Unexpected DIY Flooring Alternatives