On Thursday, January 10, 2019 at 1:00:05 AM UTC-6, John Foster wrote:
Hopefully I’ll have a Ka8b flyable this summer.

What specifically would be a cheap rope alternative to Dyneema (minus the longevity)? Someone mentioned Dacron. Anything more specific?

You can get the equivalent to Dyneema from China fairly cheap. We used Dacron (3/8 inch, I think) for quite a while. We had 4000' and stored it on a surplus wooden cable reel mounted on a trailer. Dyneema (Spectra) is light enough and less bulky so you don't need a big reel.