In Australia, for a pivot, you'd need to dig a back sloping hole in the ground and drop a post in it. That hard part is finding a straight trunk of that length to act as the lever and being Aussie wood it is going to be as heavy as anything.
There is also going to be a bit of friction between pivot trunk and the soil. so a lot more work required. Ice is easy as the friction melts it a bit and lubricates the trunk in the ice hole.
Was that wire rope? If it was sisal/hemp, it looked a bit thin to me for using in Australia. I'd expect a lot more strain on any rope in soil.
The other thing to keep in mind is that timber frame is like a sled, but also acts as a big lever to lift the car ouyt of the ice pit. I'd hate to think how much weight there would be in a few lenght of 4x4 in aussie wood.
My 2c is nice exercise, but if you are going to carry that much rope, then it doesn't take much extra to carry a couple of double/triple blocks(pulleys) to make a 4:1 or 6:1 block and tackle system. the hard part these days is finding sizeable blocks(pulleyies).