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It can get heavy so that's why I used the big ropes but my wife could easily raise and lower the pack when it was just the two of us.

Weight is always a consideration, but the haul rope if to small is hard on the hands unless you come up with another way to hold it.
I've rethought/worked my rig. I bought some of that Hi Viz Dacron line they sell for tent tie-outs.
Rated #450 lbs and is highly UV rated. Doesn't stretch as much as Paracord which important if you've ever hung a pack and woke up to find it much lower in AM than the night before. :o
It's 1/8 but hold knots well and even more important, the knots are easy to undue.
1/8 is to hard on your hands, even with gloves when lifting heavy loads, but that's easily remedied if you take a small stick, wrap cord around and walk away like the video shows.
Getting rid of that rope saves considerable weight.
Worth a try in a home test. If you don't like it, you can always cut it to tent/tarp guy lines. The Hi-Viz make them stand out at night so you don't trip on them. 8-)