Tips for planting hardy kiwi Issai (Actinidia arguta)

I'm in USDA zone 8b and am planning on transplanting kiwi Issai (Actinidia arguta)

These are very prolific berry sized kiwis and I'm wondering how sturdy of a trellis do I need to support these plants?

How long until they are hardy enough to survive the cold, 8b is probably pushing it a little.

I don't think my soil is very acidic, what amendments would you suggest for this plant?

 8b is fine for cold hardy kiwi. A freeze after bud break in spring can cause a little damage, not too bad.   You will need a stout trellis.  I used cattle panels. these put on a LOT of foliage.
Do not fertilize the plants much, just a little compost is good for massive crops. I would test your soil PH.   Mine is slightly acidic, kiwi just don't like alkaline soil.
prune them back every winter to a few buds on each spur like you do with muscadine grapes.

My hardy kiwis have seemed to really like well draining soil, and didn't care for soil that stayed too wet for very long.

I haven't grown the variety Issai, but I've heard that it is a little more less vigorous/dwarf than most other hardy kiwis.

I'm experimenting with growing them up trees as a trellis, still in the early phases of experimentation.