Am I trying to fit too much?

Hello all. This is my first post here and I am glad to have found this forum. I am building a new project studio from scratch in my back yard. I have to keep the square footage down for zoning and budget purposes, but I think I can do a lot with this space. I do record bands but nothing serious and it is mostly just a hobby that (hopefully) pays for itself. As for the construction details, it will be a monolithic slab with wire mesh. All studio space will be room within a room construction with staggered studs, insulation, and two layers of drywall with green glue. Doors will be heavy and ceilings will be 8'. I am planning on using video screens to communicate with the vocal booth and live room. The entrance will be used as storage and as an area to run a through the wall hotel style HVAC system. Large ducts and returns will be run to that room with inline fans to disperse the conditioned air through the rest of the studio. The white desk will actually be an argosy desk. At 20' x 22' overall dimensions, I know its kinda small. It has to be that way for the reasons mentioned above. How do you guys think I've used the space? Any suggestions to how it could be laid out better? Am I trying to fit too much into this space? Its going up in about two months, so I'm down to crunch time! Thanks for looking guys.

I was also thinking of adding a bath to the entryway like so...

Are your ceilings limited to 8' by zoning purposes? If not, upping those would be one way to add on some room volume without increasing your building footprint. Just check vs. your room dimensions to make sure you won't be introducing same width and height dimensions.. it seems like your walls are around 10ish feet wide. It seems like your recording room is close to a 2:3 width to length ratio. Some people are advocates of combination recording and mix rooms if the space is small because they feel that the quality of recording afforded by a larger room makes up for the inconvenience of recording with headphones. Some searching could probably turn up opinions from people who have actually done something like that.