Monitor Barn Garage Design

[DeadheadNM]

I completely agree the stairs eat up a bunch of space. I've wonder if a partially folding/mobile segment could be incorporated that would swing the lower stairs away for more clearance. Outside stairs would be nice especially with a porch that could shelter some additional storage for say kayaks or canoes. Depending on where this goes that might be the route I take.

The center bay ceiling would be largely open to let light inside. The mezzanine could potentially be extended forward more. I'd love to have plumbing but not sure that's in the cards given whet I imagine to be the hassle of connecting to the septic tank and plumbing a supply line from the house. I should probably plan for drains in the floor though.

Any suggestions on finishing the inside walls? Sheetrock would be the default but are there other options? Old barnwood is plentiful here and would make a nice accent.