This is an interesting idea from Mother Earth News, so it is not my original idea. I will be on the lookout for a few old bike frames though, and try to make one. http://www.motherearthnews.com/diy/gard ... z2eKX6UiMQ These guys know what to do with old junque.
I was thinking along the same lines as Cheryl. But two mules to get it through the concrete we call soil and a minion to trail along behind them.