Greetings, new member. You will learn as you burn! Those HUGE stoker motors are in the range of 1/25hp to 1/6 hp for the bigger units. They aren't 15hp or 75 hp 220V units. As a matter of fact, the pellet stoves use the very same gear reduction motors that the coal stokers use. Your analogy of sawdust vs an Oak log is indeed impressive, however Rice coal has the same BTU output as does Stove coal.
You will be able to figure this out as you read along to get up to speed, however as yet, you do not understand how Coal relates to other fuels in btu production.
Monthly electrical costs are minimal, as you might assume...... 5 to 8 dollars for continuous operation. A factor, but that only buys 1 gallon of gas and mix, no truck/tractor/splitter, no labor, no transportation, no saw costs, no hospital EM fees, no insurance deductible for the homeowners when the creosote filled chimney plugs and burns up your investment.....so as you say: those damned stokers do NOT include those fees, so perhaps they aren't in your future.
However if you want, read other posts from long time wood-burners who aren't going back after switching to coal.
Life is about choices, and the type of fuel you choose to heat your home and warm your family with is certainly yours.