When I say fencing just to clarify I don't mean a scrog type setup, but rather the fencing at a right angle to the ground, training the foliage along one verticle plane. This could be facing the south, to increase light exposure compared to conventional growing. So in a way it would be like scrog, but instead of the scrog screen at a right angle to the grow bulb, it would be at a right angle to the south itself. This will increase yield quite a bit, and not just through creating more tops but as I said, exposing more foliage to the max amount of sunlight possible.
Instead of chicken wire it would use two posts 1 to 2 metres long 1 to 3m apart (driven into the ground) and wires stretched between them at 30-45cm intervals, like a wire fence or grape trellis. As long as it's oriented on an east-west axis it should give maximum sun exposure.
Here is what I mean: