This is a great idea and needed. If done right it could and should replace the Dairying.
I think it's a nice, idealistic idea but completely impractical and unrealistic.
There's nobody around willing to do the planting for a start. Northland has a shortage of forestry workers despite high unemployment.
The government can't magic up a supply of workers but it could import them. Oh, now they can't.
Then you need the land...
Regional unemployment still exists in quite high numbers and given this is a regional scheme finding labourwont be too difficult.