They don't grow in my climate but we eat hummus all the time. You can buy dried chick peas in any supermarket. Even quicker is to use canned chick peas in water. It takes only a few minutes to make a batch and requires no cooking. The recipe you link to makes it sound more complicated than need be. Basic hummus is chickpeas, garlic, olive oil and lemon juice. I don't find it necessary to heat the chickpeas. Throw in the blender. Done. Tahini is a nice addition. I've never heard of dry mix for hummus but it sounds vile, not to mention pointless since it couldn't be any easier to make properly.

Growing chick peas just to be able to make hummus seems like a heck of a hassle.

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They aren't worth the effort.

I cook the dried ones with onions and garlic and run them through the food processor. Then add some toasted sesame oil or tahini, a bit of lemon juice, chilis or whatever strikes your fancy.

I like it with lime and basil on fish.

The mix is decent, fresh is better although it depends on your definition of easy.

yield of chickpea/garbanzo beans is between 10-24 lbs per 100 ft row.

Art, you can buy a bag of dried garbanzos or cans already cooked at the grocery. I make homemade hummus frequently, there's a zillion great recipes on line.

I don't think you live in a suitable climate, regardless.

Your question is akin to asking how to grow potatoes because you want to make your own chips.

I grew a variety called "winnifred's garbanzo" last year, and will grow again. I direct sowed them, and they grew very large and produced a lot. I was very happy with them. Nothing (IMO) beats fresh chickpeas! Sorry, can't remember where I got them.

garbanzo are for sandy, semi-arid conditions. low yield but they make it where other more demanding crops do not make it.