This is pretty cool. Just found this thread cause I had the same idea today and was googleing around! My original idea was some sort of webbing, but then, like you, I saw the paracord idea.

Been using a converted steel trailer that a friend gave me, with a wooden deck and it weighs a ton. Yesterday I found an aluminum kiddy trailer at the thrift store for 5 bucks. less than half the weight of the steel trailer and I want to keep it light.

Hows it holding up?