After take a break I came back and finished dry fitting the sewage plumbing. I then notched out the joists where the pipe would pass thru and placed everything. The slope is about 1/4" per foot. Everything looks like it will work. I had to cut a hole in the plywood to make room for the shower trap. I'll be adding about 4" of insulation under it to keep it from freezing in the winter.
Expenses to date $5,571