Sounds like a plan
Just remember that each gram of hops added will soak up around 15ml of wort. You may want to adjust your recipe to account for this and ensure you end up with the amount of beer you desire at the end.
Good point here, although that estimate seems a bit high. That works out to almost 2 gallons for a pound of hops. I've stuffed a pound of hops in 1 gallon before and was still able to wring out a few pints worth into the fermenter. I'd say a gallon per pound of hops is closer to what I get.
But that brings up another good point. You will have a LOT of hop material in the kettle, and you will want to keep as much out of your fermenter as possible. I'm not sure what your rig looks like, but a hopback (or something equivalent) will be really helpful.
I brew 3 gallon batches (2 gallons for IPA
), so this may not work as well at different scales. What I've done is rack to my fermenter through an autosiphon. I stuff a nylon stocking with an ounce or so of whole cone hops and zip-tie it to the outflow from the tubing. This is a great filter bed and it catches most of the gunk flowing through from the kettle.