I THINK I'M IN HEART WITH THIS MINE MYSELF, HOWEVER I DON'T BELIEVE I HAVE THE TALENT OR PATIENCE TO SCRATCH BUILD ONE, I HOPE YOU POST PICTURES OF YOURS WHEN IT IS DONE.
Wish you success however I would like to use wood only. I think the fastest way will be when you build a basic construction from cardboard and than add sheetings from wood strips, clapp boards and scribbed boards.
We all are interested seeing progress of this mine.