Lets see....1 crane (S64E) in a 60 minute cyle burns 2,000 ltrs. of fuel, and we will rip approx. 400,000 lbs of timber off the hill !!!! Plus our crew trucks, loaders, processors, and loading trucks.......I love our carbon footprint...
This touches again on the ambiguity of the thread - individual impact vs impact from the industries that employ individuals but ultimately serve the same individuals.
If you love it so much, you would presumably take a more leisurely approach to your lifting? I imagine Adam Smith's invisible hand would shoo you away giving you the opportunity to work elsewhere if you did this?
You could exercise your maths skills a bit more and work out the CDE per cubic metre of sustainable (?) lumber including the harvesting + processing + transport to the (range of) end customers. The price mechanism already contains strong elements of this calculation. It would be interesting to see how much it differs from other forms of agriculture, many of which will be significant users of fertilizer and pesticides.