Just an idea....
Doing a deck repair last year for a buddy, while looking at a lumber list from Lowes I noticed that they have 2X4's made out of composite material. Not sure what brands they had them in, but I'm sure I saw them because I said to myself that I never knew that they made them before. They would outlast all other material.
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You have to go out on a limb sometimes, cause that is where the fruit is. You can't get to the fruit from that nice safe spot, clinging to the trunk of the tree...... 
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