Well, the gangway is solid Alu on a pivot.
As compared to hoisting the dinghy amidship, my solution has some advantages...
Any line works vertically
The dinghy does not touch the hull
The dinghy is partly protected astern, and offers much less windage (indeed, it is great to turn it backwards, as proposed)
But , in the ordinary airship position, l find it difficult to imagine the dinghy being lifted horizontally when bumping into the hull
, (with a halyard some 20degrees out of its line) as it should tilt inward (against the boat) at ease.
Maybe a 2nd person is needed, for doing this...
If properly implemented (no kledge!) l don't see many disadvantages in my idea, yet.
PS l assume a gangway as designed to wear the dynamic stress of a walking person.... So...what's the concern about it?
Here, in the despicable city of catania (Sicily) I find 7/8" titanium pipes at 11eur/meter