Trellising hardy kiwi?

I recently found this video of a simple T trellis set up and wanted to get your opinion on dimensions- everywhere online people say 10ft is a good spacing but based on your recommendation I’ll likely do more (15 or 20 per vine, with 5 wires instead of 3).

If I have a single linear row of about 50ft for the two female kiwis, would you recommend the male go in the center, or a grafted vine, or something else?

Based on your advice, I’ll plant Cordifolia as a female along with hopefully a purple variety. Is there a male variety that is recommended (for low vigor maybe :thinking:)