I am converting a new 10x20 storage shed into a cabin in central Florida. The shed came from cook portable warehouse in Ga. The inside walls are 2x4 16" on center and I will finish with 1x6 knotty pine boards for that log cabin look I love so much. My question is this I want to insulate the crap out of the walls to help with cooling cost. I use my heat maybe 30 days out of the year so 99% of the time the goal will be to keep it cool inside. Looking for ideas. It's only 200 sf. so cost is not a big deal. Thought about the great stuff foam around all the studs where they meet the outer wall, then maybe a foil radiant barrier, then pink fiberglass batts and maybe another layer of foil type radiant barrier which I would put the pine paneling directly over or maybe roofing tar paper like I used for floor tile many years ago. Any advice would be helpful. I Have to finish the ceiling also which is built just like the walls.