My RMH design for a Greenhouse with Geothermal Stratification Dual Bells

So after pondering upon what I've learned so far from this Permies forum and Paul Wheaton and others vidoes with Stratification Bells, as well as my previous experiments with cinder blocks, I came up with this design for a Greenhouse l want to build. It will have a dual bell system with the secondary Bell being under raised beds with dirt on top, and the whole thing built on a trailer( with the trailer underside insulated) , minus the RMH main burner which will not be on the trailer.

Using the principle that colder air drops and with enough air channel volume to prevent back pressure build up, I'm theorizing that there is no need for a vertical chimmey and that we can exploit cold air stratification and dropping to create the exhaust flow. Also, cold air is heavier  than warmer air so gravity will aid in the air "dropping or spilling out of the system as long as the channel air volume is sufficient to not create back pressure against the air movement.

One other thing not depicted in my crude diagram below is the idea that the entire greenhouse and RMH will also be on an second adjacent trailer to the Bell trailer so that the underside of both trailers can be insulated to separate the ground geothermal heat underneath as a potential auxiliary heat souce, and also to prevent the RMH heat going into the 50 deg ground. This would allow a tropical growing enviroment Heated by the Sun as the primary heat source, and the RMH as the secondary when needed, and finally the 50 deg ground underneath as a third source which would could be used to ensure the above temp never dropped below 50 deg by simply having air vents that will naturally allow the 50 air to rise woth a natural convection is the above temp ever gets that low. Since hot air doesn't like to go down, as long as the air in the above greenhouse was above 50 deg, it wouldn't flow down the vents into the below geothermal ground source. This way the RMH and geothermal aren't working against each other.

I love the idea of using cinder blocks to make the floor under the raised bed with muliple air flow channels to extract the remaining residual heat into the raised bed dirt. Since the blocks will be covered with at least 12"-18" of dirt air leaks would be of no concern. Perhaps proper water drainage would be the biggest thing to plan and account for.

Anyway, open to ideas and critique, thanks!

Oh, and I forgot to draw in the diagram that there will be an access panel  to inspect and clean all the cinder block channels if ever needed on the outside of the greenhouse where the air spill outlet is. Thankyou and Good day.

Oh, another second oh.... I made a mistake in the drawing on the insulation of the air outlet spill. It shows the underside of the blocks on the ground outside of the greenhouse being insulated, but the underside of these blocks would actually NOT be insulated so that the geothermal ground heat on their underside would heat up any potential backdraft cold air if somehow a small amount was able to rise UP into the blocks and go back in.The idea is to not allow cold air to backdraft and chill the secondary bell. The purpose for the insulation extending out away frombthe blocks on the ground on the outside of the greenhouse is to keep the frostline of the ground away from the ground under the blocks.

Also, if backdraft from wind was ever an issue, I'm thinking a box structure could be built around the air outlet spill as high as needed with only an open top to block wind from entering. Thankyou and Good day yet again.

Oh, one more third and final oh (I hope).... I forgot to put a 55 gal steel barrel in the design between the RMH and the Main Bell which would extract primary instant heat so that the temp going through the secondary bell would be kept low enough to not damage the plants roots. With enough thermal mass in the Main and secondary Bells this shouldn't ever be an issue though regardless I think. Still a Good day.

How did it go?