I think I would make the fireplace side the backyard, moving the garage door to the front. I would also take over bedroom #2 for bigger bath with closet walk through. Removing master bath and giving it to other bathroom for a second full suite with walk through closet for Prince William
This is a Texas Barndominium, yes really! Built by W.D Metal Buildings of Pleasanton, Tx. Worth checking out. Love the interior and exterior architectural elements of this structure and it very practical application to a lower cost home design.