I have attached the floor plan of th elower level of the house as I have it now. The outside lines represent the foundation walls and will not move. The arrows show stair. The top is north and there is a 10' overhead garage door there. South of the stairs is the stairwell going up stairs. Under those stairs will be walled in for dark dry storage. I expect the lower right 'room' to be propane furnace, air compressor, dust collector and air intake for the air handler of the earthtube system. Upper right will be mechanical and metal working area. The rest is woodshop. "Garage' area (required by the county) is assembly area. FWIW, hot water will be on-demand heaters upstairs and down.
Thoughts. And thinking about where to place the air cleaner.
Now see the stairs are not labeled. Middle left bump out is the mid level stair landing. HTH.
Oh, and why such a convoluted profile? The screwy lot shape dictates it.