I got my hands on 30 finished solid core doors including hinges and
Schlage locks. They are mortised and drilled. No Jams! I could buy
pine and make the jams, but I really don't like pine. Birch would go
with the remainder of the woodwork in the house, but at $3 - $4 a
board foot for rough cut in varying widths, and all the work in
preparation, it will cost a fortune and take forever.

Would birch ply be strong enough, and hard enough, to withstand the
wear and tear of daily living? The surface that shows would be
hardwood. Very little of the edges show and could easily be finished
with 1/4 inch strips of real birch.

Len