Pine trees are a pain in the bum. My little lifestyle block had them planted almost right around my 1 hectare property, with a couple of rows thrown in for good measure. @4 years later a third of them are still there. They were planted too close together. They don't do your pasture any good either - there's a reason they grow so quick. Unless there is a large stand of similar tress nearby with easy access you may find it difficult to find someone to take them. I think pine trees must have been the 80's version of emus for lifestyle block owners. I use mine for firewood

And the GOVT wants to plant millions more. Yes to  planting natives.

ok been checking out the wood gasifiers in the US. These guys are making wood powered cars and trucks. Work.

I bought 10 acres in town here 3 years ago and it had old man pine (untrimmed).
Asked a bunch of people if they wanted them and in the end got $7500 for them standing.
Went through several people before I found someone who screws around with small amounts.
Pine Price was high and we were lucky I guess.
I have some stumps for sale if anyone wants them?
Dig your own.

Wood powered electricity plants are all over the US. Apparently, if they cut and burned every tree in the US that would provide only one year of power.Not at all sustainable which makes those plants not at all what they are cracked up to be. However, might be an ok way for you to get rid of trees you don't want.  

There used to be guys with a portable mill, who could come to your property, chop the trees and leave you with pile of timber. You could then get timber treated if required. You don't want timber with knots so lower branches should have been trimmed off as tree grows. If this hasn't been done timber will be of lower grade..

thanks Moritz. 

http://www.woodbank.co.nz/harvesting-marketing/

way more helpful than smudges post Mr Moritz😂

Adding value to one is great.
I watched a repeat of a program, might have been the am show or something, and winning was going on about hedging ourselves, and stop selling raw material to foreigners, and stop putting all of our eggs in one particular basket..and I agree with him.
No more wooden furniture made in China out of nz sourced logs?

Meantime, the pipe and hollow sections plant at the steel mill,is looking to be axed...cheap imports..