Umm, I'm not sure I see the problem? Instead of wax, what about oil cloth? - (Boiled linseed oil + a distilate) Cotton tent's are ok, you just need to have a fly and set it up right, wood poles, or even staff's, can be quite light they don't need to be tree trunks. No need to reinvent your cordage etc each time, it is reusable!
Canvas is not necessarily much heavier, it just depends on the size of your shelter. I have one of two very old canvas sheets with eyelets, the sort used for covering goods.
One of our members on here had a light drag cart as he had a bad back and couldn't wear a rucksack.
Although I reuse all, (all,) of my plastic bags multiple times before I dump them, I have bought some waxed wrapping paper, and a local professional Beek has told me how to make some more, and how she makes candles.
I don't think we'll ever be nettle free, I've been trying to get rid of it in my garden for 20 years, although I haven't bothered trying to make cordage with it. Hemp is very viable, and lasts well if looked after, its a key bit of my ladder safety gear. Modern cotton string is rubbish, very weak, poorly made. Old string was a bit thicker and much stronger, and lasted well if you waxed it. On the Victorian farm tv programmne they made a duvet by sewing brown paper.
There are still canvas rucksacks on the market old ones and new. I have several post-war meths stoves, similar to a trangia, set in an old fashioned tin with a lid. I avoid ally pots and pans and prefer stainless steel.
I buy new as and when the fancy takes me but much of my gear is very old, and a few bits older than me and came from my parents.