So many of you guys put stoves in the cellar and want to heat the 1st floor.Why don't you put in a furnace? 1 return and a couple of feeds and your done.Flex duct is cheap and the whole house will be even temp wise and you don't have to worry about insulating the walls in the cellar.Some heat will be lost in the cellar but that good( keeps the floors warmer).If you want to finish the cellar later fine run another duct and finish the walls.
Just my .02
DON
Oh yeah ashes.Put a metal garbage can outside the cellar door and empty ashes there.When it's full wheel it to the front and let the garbage man take it.As for the bilco door build another door at the bottom of the stairs.Nothing fancy just an exterior door PAINTED with some weatherstriping and a sweep.