Thinking further on this trellis setup, using the setup I mentioned earlier when the trellis is full and ready to harvest it would be reasonably heavy and difficult to lay down.
Keeping with my original suggestion to set it up but for easy maintenance etc I thought of using eye bolts to lower the whole set up
.
The threaded eye bolt would need to be long enough to go through the steel rail.
One nut each side of the rail to lock the eye bolt in place,with an eye bolt at the top of both rails.
Tie one end of the rope off to one eye bolt and then run the rope through the other at the other end leaving plenty of rope so you can lower the whole rope trellis to the ground.
It's a cheap pulley system.
( hope this makes sense).
I wouldn't have the ropes pulled tight because It would allow for movement if it got windy and the bines are flexible enough to accommodate for this.
Again I hope this makes sense,give it a go.
Edit: between the 2 eye bolts simply tie as many vertical ropes as you need to the top rope and anchor the other end to the ground with a stake or whatever you find suitable.