And weigh that against; chainsaw breaking, truck won't run, tire flat, need new chain, fuel etc. Your gonna have maintenance either way, just depends on which side of the process you want it on.
What you have to remember is that those potential problems (never had them) happen during the off season when you're accumulating fuel and not related to the actual heat producing device. These potential break downs are not heat related and won't leave you with a cold house in the winter. Compare to a pellet eater that only breaks down when you're using it which will result in a cold house in the winter.
As they say, "the hay is in the barn". Once your wood fuel is prepared then you're done. Just burn it. No worry about a break down at a bad time.
Your stove choice factors into this too. It was double the work to heat my home with a non-cat and it's 9 hour burns than it is with my cat stove and its 24 hour burns. The non-cat used more wood too! So to minimize the efforts of biomass heating, as well as the cost of biomass heating, your stove choice is important.