Working down from the Axle Connectors w/Leaves we have 2L Axles going into a Dark Brown Triple Axle/Pin Connector linked by a Friction Axle/Pin to a Reddish Brown 2L Pin Connector w/Slot. Then there are two 1x1 Round Bricks with a 1x1 Round Plate between them, and it ends in a Smooth 2L Axle Connector attached to the stack with a Friction Axle/Pin. This is a total of twelve pieces which is 2 Hits. It's 32 feet tall and 19 feet wide in 6P Scale. As you can see from the size comparison picture it is fairly large.
I chose to end it in the Smooth 2L Axle Connector so I didn't have to use a Large Jumper (of either the Square or Round variety) to secure it to the Plate. The Friction Axle/Pin between that and the 1x1 Round Brick is slightly exposed but I can live with that.
In terms of price the 2L Axles are $0.01 each, Triple Axle/Pin Connector is $0.03, Friction Axle/Pins are $0.01 each, the 2L Pin Connector w/Slot is $0.02, 1x1 Round Bricks are $0.01 each, the 1x1 Round Plate is $0.01, and the Smooth 2L Axle Connector is $0.01 for a total of $10.07 for the entire tree. I hope this gives people ideas or techniques to use in their terrain builds.