Commercial Timber - How To Determine Value & Harvest Schedule

I am considering purchasing a property which is split zoned Rural Forestry (RF) and Commercial Forestry (CF). These are both resource designations with mostly resource uses allowed. I'd like the own the land for a long-term hold; however, having most of the land being zoned CF I am wondering how do I go about determine the value of the timber and when I would be allowed to harvest it, well I wouldn't harvest it but rather have someone pay me to do so.

The land is in Washington State. I am going to go walk the entire perimeter of the property on Sunday and would appreciate any tips on what I should be looking for.

Thank You.