Wood stoves are wood stoves, in that they all hold a fixed load of BTU’s (eg. 75 lb. of firewood), and control the release rate of those BTU’s. The primary difference between the King and what you’re running now, with regard to how you’re already doing things, is that you’ll be able to run the desired burn rates without the chimney creosote. As long as you keep that combustor running in the active region, your chimney should stay pretty clean.
The King will likely fall short of your current rig for quickly bringing a cold shop up to temperature, but will easily outperform what you have now for keeping things at the desired temperature over long runs.
The King should also have much better efficiency over the Lincoln, at all burn rates, but particularly on lower settings. This should pay back in a lower overall consumption of wood, which means less hours harvesting, splitting, stacking, and loading.
With the 14' sidewalls I'd be contemplating a wood furnace. Large! You have a tremendous amount of cubic feet to heat! Heating a area that big is beyond my knowledge base. Others will be chiming in.
