We are trying to do something similar with 20 acres. The pine was logged 4 years ago. There are hardwoods on one side of the property and there were oaks, maples, and sycamore mixed into the pine. Everything is coming back naturally. We are cutting the pine and selectively leaving the larger hardwoods every 10 to 20 feet for a more open feel. We have been brush hogging trails and have noticed an increase in deer. We do have to worry about when to cut so we don't remove the late fall flowers for the monarch butterflies. The birds of prey hunt our scraggly mess and there are lots of small bird nests in the saplings and brambles. The scrub would make for great goat forage but we are not on the property full time so no goats, only machines for keeping things down.
It might be easier to log the pine and work with a clean slate, IMO.
Melissa