I'm a young record engineer / producer and it's time for me to build my first studio. I live in a small town near Milan and the location I've found is a ~70sq m old warehouse, used by the owner as a car garage for a while.
The purpose of the facility is to become a semi professional studio (for my productions and small recordings) and a rehearsal room.
After some thoughts, I've set up two designs (just a little difference between them) for the entire facility.


(in the second pic I couldn't erase two black wall lines between the control room and the small office on the upper left corner).
The live room is in blue and the control room is in grey.
I know this is a weird design, but I have to explain some considerations.
In the warehouse there aren't any inner walls, only a small "machine room" in the lower right corner (this will be a closet for mic stands and random stuff, light blue in the plan). And there's a door on the upper wall, which opens to another room (not built yet). There will be the bathroom and a storage room (for speakers and amplifiers I will rent out).
Another limitation is that I have to take my Kawai GS30 (three quarters of a Grand Piano in lenght) in the recording room, so I can't make narrow angles between hallways and the live room has to be quite spacious. And there's gonna be rehearsals in the same room.
Then I will need a small entrance / waiting room (with coffe and other stuff) and a small office (on the upper left, in yellow).
I almost forgot, the original ceiling is very high (~ 4m) but the girders are ~2,70m from the ground.
I want to ask: how about the acoustics of the control room? And how i can manage room ratios with trapezoidal-shaped rooms?
This is only a first idea, I don't have precise sizes and measurements, but with some clearer ideas I will ask an architect to complete the plan for me.
And let me thank you for this incredible forum

(sorry for the bad plans, I can't use CAD or design softwares...I prefer DAWs)