like the pocket doors- glass doors maybe a good idea from the great room to the 4 season porch to let the most light in. For even more light maybe fixed glass doors/windows on either side.
The J-Track system is one of the worlds oldest rolling door designs and yet it still reigns king of low clearance applications.
Inexpensive DIY rolling barn door style hardware--- for pantry door.
Our hand-forged, rustic Hammered Flat Track Sliding Interior Barn Door Hardware is a great DIY solution.