Gregger Jordan

Thak you for your responses.  

Is it possible to combine a dakota firepit with a rmh?    Check out ldspreppers geothermal greenhouse on youtube.  Even 55 degrees found 3.5 feet deep is better than 10 degrees.  Im in zone 7b or a.  So 10 degrees is the average maximum coldness.  I will have to consider the above replies but it may be best to keep the fire far from the gasoline perhaps 40 feet downhill and make a big dakota fire pit and channel the smoke underground and use a blower to suck heated air indoors and into a greenhouse.  The water barrier mau be needed too.  As well as insulation lile leaf shreds in trashbags.  There is potemtial and its somewhat new.

Northwest south Carolina at the corner in the mountains is where i live.  The coldest night is usually 22 degrees maybe.  Im curious if a trench 3 feet deep beside the garden of  food with a plastic cover over them will keep them from freezing.  A mini greenhouse of sorts.
I saw a video with just greenhouse air circulating underground with a blower 24 7 and his temps were great.  The deep earth acts like a thermal battery and warms up in the day and discharges at night.  This may be the best solution for the rig but with a wood burner as well.  But my biggest question is which rocket mass heater requires the least fiddling to get it started and is cheap to build and how long does it take to get started?  With a blowtorch and starter fluid? Can it be going in 15 minutes?

Also any ideas for the underground tunnel portion?  10 inch vent pipe and cheap chicken-wire and clay for the roof over a tunnel and a layer of clay and then branches laid across the top for more support? Then more fill dirt over that maybe all 4 feet deep with a layer of leaves on top for extra insulation.  It sounds like fun.  My lot is on a 1 to 3 grade. Under 1 foot deep is red clay dirt.  I wonder if it would be just as efficient as a converted 55gal drum wood burning stove with its chimney going through the deep clay to have all the heat absorbed before the smoke gets above ground?  What do you think?  I can do this because of the steep grade.  The chimney can have a shallow angle rise underground before it goes vertical and rises 15 feet above ground.  

The rules. Of writing this added an extra 30 minutes to this editing with a cellphone for a keyboard. Its absurd but this information is worth it.
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It would be best if the rmh was built outside with the heat battery under the rv.  Then the rv can drive off to refill water... And repark over the rmh heat storage e mass battery.  Some siding can be placed to prevent an underdraft and keep more heat in as it rises through the floor.  Rvs have little space inside.  It can be loaded w wood outside but hopefully wont require too much going in and out.  If the burn chamber is behind the rear bumper on the ground then the heat battery wont have to be driven over.

What would be a good design for permenant rv dwellers?
Points
Easy fire setup and less fuddling w the wood.
Put the heat battery under the rv away from fuel tank.
Put the firewood door and combustion chamber outside the bedroom window.
Consider using a small fan to get the fire started and the smoke sucking down under the rv and out the chimney top.

Which designs would this work best with?  Or if it cant work then whats a good cheap solution?  Build a little brick woodburn stove?  Rvs slam on breaks and make fast lane changes sometimes and have little room.