Using 4'x8 plywood flooring instead of hardwood flooring. Sealed here with just polyurethane. Saw it on Everyday Cheapskate.
Geometric plywood floor
How To Lay A Plywood Floor
Get the facts and then go on to gorgeous DIY results with this inexpensive alternative to hardwood: plywood floors.
A Newbie's Guide to Plywood Plank Flooring: http://sharktails.ca/2016/04/22/newbies-guide-plywood-plank-flooring-part-1-prepping-laying-boards
2' by 8' smooth finished plywood. Wish I had a finished picture of this. If he takes as much time with his finish choices/application as he did with his cuts, it probably looks incredible.
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Cut down a few sheets of plywood and use them for the horizontal planked walls, or on the floor.......d.
Installing Plywood Floors. Great advice.