After spending some time relearning XTrackCAD, this is what I came up with. The boxes in the upper left represent the archway entrance into the room and the revised location of the workbench. I didn't have enough space up top to do the loops, unfortunately, so I reworked it for the mine area. Thoughts or suggestions?
The turntable only needs 2 leads. the 3rd one wastes one of the yard tracks. Looks like there's room for 2 more yard tracks in that space. If you're like most of us you WILL add more rolling stock!
Are you modeling steam era only? If diesels only the turntable is a waste of space. Add a wye in place of the turntable to turn any diesels.