Has anyone used one of these, www.choice.com.au/transport/cars/accessories/articles/air-hawk-first-look
To inflate wings

I haven't - but you want something that has a two-stage pump, with a low pressure inflator to get the initial volume and then something to bring it up to pressure. Otherwise you'll be sitting around on the beach watching your mates while your wing slowly inflates.

eg, that unit takes 9 minutes from flat tyre to pressure. The first 7 is getting enough air in the tyre.

Better off getting a low pressure inflator then adding a few pumps, a kite-specific one that changes over automatically, or ryobi do a combo one but you'd have to swap between the two.

That's a low volume, high pressure, pump. It would likely take 30minites to fill... Just get a auto shutoff, two stage electric or battery air pump. The best part is they tend to actually give a very accurate pressure PSI, unlike most hand pumps.