One other problem with the wood from your tree farms would be that they are relatively fast growing with wide growth rings, significantly weaker than "wild" trees, with narrower rings.

The changes in wood quality are the reason than lumber from submerged logs, and older buildings is so valuable. I have done research on late nineteenth century schooners, and the quality of wood you see in their hulls is incredible - beams fifty feet long (and longer) with few if any knots, closely spaced rings - absolutely beautiful wood that is just about extinct today.