cool but one correction.
They are 15 pounds per sqft so 60 pounds per unit.
At 15 pounds per unit removing the tar and gravel and replacing it with a torch down and this would be about the same weight or maybe even less. At 15 per sqft I think I still need to restructure. I showed the idea to my wife and said what about wild flowers? and she loved the idea enough to have me look into prices.
Obviously I've got some more research to do.
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