Thanks David for the response.
We worked the math and all seems ok. Studio will be 25 feet wide and 24 feet long.
8 x 8 Darkroom will be in the corner opposite the camera area. Office work area will be in the other corner (other end of camera room area). We'll have 20 feet from subject to back wall. This is more than enough space for H/S or full length.
The camera room side of the darkroom walls and down the right side of camera room will be used for the gallery. Proper lighting of course. We'll display smaller pieces and images near and aroung the office are.
BTW: office will not be an enclosed room. We're planning to use an L shaped 1/2 wall. This will give us additional room to display images.
Wish I could draw out the layout! Grins.