I figure when they're mature I will indeed be overwhelmed and looking to sell them. Next year I'm adding another 30.
As for fertilizer I dosed them twice with fish fertilizer and added horse manure over the winter. This winter it will be green compost and chicken manure. lots of water, one gallon every 12 hours on a drip system.
My Cascades have small cones, as did my Norther Brewer. The Goldings, Magnum and Chinooks had great massive cones. The Sterling, Mt Hood, and Willamette were about half way in between.