This pattern just grabs me
I have never worked on anything but aida.  I like the routine of aida 14 or 16 count.  But this really grabs me.  I have also never done a HAED.   My question is this,  if I  did 
Stitch Count 350w x 529h
Fabric25ct. Evenweave over 1
How much fabric do I need?  What color would you choose?  Is this a multi-year undertaking : / ?