homemade geocell?

[HumanFriend]

Any ideas on how to do a cheap version of this stuff?
Our leach drains are on two levels and should have been retained twenty years ago and now the embankments are in a bad, bad way with the clay bund giving out and the sand going down hill. (We live in a pole home on a hillside.)
Geocell looks like it could do the trick in many areas but is quite expensive from what I have seen online. I’m not sure where to get it, either, unless there is a cheap knock-off by the local Bunnings with a different name?
Ideally I would like retaining walls but we have a LOT of rock and the digging would be hard, and access for machinery impossible. I guess the best we could do there would be star pickets and salvaged old colorbond sheeting, then backfill. Stacked, old tyres we’ve tried in one section but the ground is sloping and it looks frightful.
Money is the thing, unfortunately.
So, any suggestions for the diy geocell or anything else by clever people would be appreciated!

[Snags]

Have you got a photo?

[Author]

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