Energy Efficiency in Appalachian Home Build

Hi y'all-
It's been a while, and I'm excited to be back and building again.  The new context of living deep in the forest of Southern Appalachia offers new challenges and unimagined opportunities.  Here we go!
What's interesting about this context?  
-80 inches of rain per year with no dry season
-A forest biome that goes dormant in the winter, and then explodes into tropical rainforest level life in the summertime.
-Limited sunshine, from the trees and the clouds and the valley.  
-Moderate average temperatures.  Huge swings in seasonal humidity.
-Nearly limitless wood for building, burning, berming, hugelkulturing, mushrooming, etc.  
-I'm a family of five, with three strong smart motivated teenagers to help/lead/inspire.  It's not dad and the kids anymore.  It's a crew.  

About to build a small family home.  Lots could be said, but it's looking like a 20x30 footprint.  Earth-berm, two stories.  Earthen Floor.  2x8 Stud Walls with Cellulose insulation.  Geothermal air tubes with ventilated attic to draw cool(er) and dry(er) air into house during summer.  Big eaves and big windows.  See attached drawing for the scheme of things.

And a super sweet rocket cookstove for heat in the winter.  That's where this thread wants to head.  In the direction of designing the dream stove that is going to be at the center of this home.

Here's what I'm hoping to accomplish, not really knowing much about rocket stove design-

1) A glass cooktop for conventional cooking on wood heat
2) A decent size firebox so I can burn larger chunks of wood and not little sticks
3) Ability to heat a tank of water for bathing
4) 48" x 48" footprint, standard chimney through the roof
5) something I can build myself in a resourceful and economical way
6) ability to cook without pumping an enormous amount of heat into the house
7) there's going to be a gas stove as well, so this doesn't need to do all the cooking.  in summer i'll be cooking outside entirely.  

So far, I'd say the stoves Matt Walker is demonstrating are the most exciting to me.  

Excited to get a big group think going on for this project.  This is going to be epic.

Great to have you back at the forum!

The footprint of your floorplan is very similar to my house.

Is that a spiral staircase?

Is the bathroom and laundry upstairs?

I like the Matt Walker cookstove so I am glad you chose that design.

I am looking forward to hearing more about your build as it progresses.

Hi Adam;
Sounds like an exciting build you are planning!
With your desire for an RMH cook stove, Matt Walker's designs are proven.
The Lorena stove is also a proven design.

The problem is your hope for a larger firebox, neither stove allows large pieces.
Your comment on not wanting to use little sticks is a bit outdated. Only a small size J-tube requires "tiny fuel".
Most like the Walker, once going, use 3-4" "cookstove" size split wood.
Heating water can be accomplished however it is a slow process when done safely.
This means your stove needs to be burning all day.
Perhaps you need two stoves? One to cook on and another for mass heat production?  I suggest a batchbox with a bell design for heating your water.
Or perhaps the Tim Barker J-Tube outdoor water heater might interest you?  https://www.permaculturenews.org/2012/11/23/rocket-stove-hot-water/

A common mistake is asking an RMH to accomplish too many things.
They are an awesome tool but not capable of leaping tall buildings in a single bound... (Superman reference)

I would install a radiant in-floor heating system for both stories. That way if you get sick or want to go on vacation or sell/rent, you give yourself options all for an extra $500 in pex-piping for the floor, (maybe another $800 for a instant hot water heater and misc).

Heat/Coolth:
Thermal Mass, Insulation, Winter Solar Gain, Summer Shading, pex-piping to even out the floor temp, venting kitchens/bathroom/laundryroom humidity-heat, ERV-ventilator, Heat-Pump if needed, RMH

Energy:
Solar/Wind/MicroHydro Production, Production Time Usage of energy if local production aka have the laundry machine start a load at 12-noon via wifi, use a slow cooker that slowly sips energy from your micro-hydro for 10hrs(600minutes) vs a blast of energy in just 30minutes. Use a laptop vs a huge computer/tv. Eat more raw food

Not related to RMHs, but if you're dead set on a spiral staircase (which it looks like your plans have), be sure and have a way to get large items such as furniture upstairs. Large window or something along those lines perhaps.