Interesting idea.
I would agree with the two barrel modification.
It does double the amount of heat put out.
And realize that much off the heat felt from a wood stove is radiation and you are not going to get that.
I would double drywall the walls of your room for fireproofing and then put up a sheet of perforated metal, spaced 2 or 3 inches from the wall on all walls.
This will grab some radiation heat before it hit’s the drywall.
Do the same to the ceiling.
Do not insulate the room. You do not want it to over heat.
Get a good CFM fan for the long duct run.
One from an old clothes dryer should work OK.
They are designed to move a lot of heavy, damp air and do well with dry air.
Hook it to a thermostat backwards.
(So it comes on when hot and goes off when the room cools.
If you cannot find on that does that hook it to a relay to accomplish the same thing.)
Hook a small, oscillating fan that you set on the floor to the same thermostat.
Hang another oscillating fan from the ceiling, or put it on a high shelf, so that it cools the ceiling.
You want to keep the air in the room from getting stagnant “hot spots.”
Put the inlet air vent through the wall at least 24 inches above the floor.
Minimize the door to floor gap. Maybe even a cheap weather strip.
You don’t want to **** in any fumes that settle to the floor.
Read up well on wood heating.
It is not as simple as build a fire in a fireplace.
When you build your stove make it air tight at all joints.
You want complete control on how much air is let in.
And put a damper in your exhaust pipe.
You can adjust your draw that way.
And don’t expect to get it right the first season.
It took me three years to get mine balanced to the point it was a twice a day loading.