Not sure where your located at so here goes. I would take every poplar you have. I went through a wild fire last year and lost most of my trees. Calling around here looking for some poplars, Blue Spruce, maple trees and willows. From what I understand they grow quickly. As I need to reforest quickly. 8ft poplar was quoted $150 each. Which would break my wallet.
So I would say you could make money off of growing trees. As far as taxes go, any money you make the government wants it.