I kind of just jumped right into grow hops, and didnt really know what i was getting into. I am building a trellis on a budget. 2 10 foot 2x4s drilled together side by side to create a 4x4 ( actually cheaper this way). I was going to dig down three feet and cement them in. This would leave seven feet of wood above ground. I was then going to take 2 inch 12 foot PVC piping to extend the trallis, and would connect the pvc to the 4x4 giving it roughly 16 feet to grow on. Does this sound stable? I have seen this done on HBT, but metal piping was used not PVC. Also I was going to use manilla 3/8rope... is this an exceptable kind? I am growing glacier, tett, hall, horizon, and willamete.