On one end there is room for a dozen logs and the other end has room for a couple of two-wheel trailers, also a planer, shaper, jointer, table saw and swing saw with roller table. I have heat from an outside furnace. 50 degrees inside when it's minus 15 outside makes life easier. Sawdust shoots straight at a short wall then drops into a u-trough with a small auger in it. I can saw 2 logs before needing to run it.
Slabs go to the furnace and sawdust goes to mulch trees.
I have done this for five years and it works well. Work with your insurance people to find out how to reduce the risk of fire. Remember that wet sawdust can freeze solid, so move it out of the mill quickly. An enclosed building is also a fire hazard as the fine dust is very flammable even at very low temperatures. So, if you want to be safe, always clean the dust off of the structure, taking care to avoid breathing fine dust.