There be wood out there.... look for pallets, shipping crates, look at Home Depots trash pile near their saw, same for Lowes, drive around on trash day and you see wood everywhere.... old cabinet doors, furniture ( dressers, etc ). I just had a neighbor that redid her flooring and gave me 3/4 of a box of 9/16 in. thick 4" wide, 36 in long bamboo flooring that she had left over. Once your neighbors realize that you use wood it will start showing up for you to use I bet.
DW