My friend's son is doing this as his summer business - he is a tree surgeon and has a log business in autumn and winter. His creations are amazing, he has some super ideas, and actually the seats are very comfortable.
My own son has built a fence for me, and topped it with trellis from B 7 M, but I can't find any planters to fit between the main base and the supports so I can have flowers etc along it's length and climbing the trellis.
I think it's wonderful to recycle pallets!