Phillip Maine

All of this is good, but all you really need is a converted 2 cylinder motor, a steam pressure container with pressure releases, and a electric cook stove top hooked to a 250 amp alternator with leads around the dc conversion diodes  It could also be powered by a 1-1/2 horse motor hooked to the alternator which would power the motor.  Either way will work.  The Alternator puts out 220 volts and 250 amps  The Motor draws 16 amps which would leave the rest of the 234 amps to run the hydraulic motor.

Just thought something else.  The space from the top of the insulated (required) riser to the barrel can be no more then 2 inches.

The Rocket stove is best built above ground.  It will keep the ground warm anyway.   20 feet or six meters of pipe is about the max before the pipe is exited.  When you install it build a way to circulate just a very little of your smoke into the green house, your plants will love it.  Use the top of the mass heater to start your seeds.