Renovation of 400 sqft. multiple use studio in Brooklyn NY

Hi everyone this is my first time posting to this site, although I have been a longtime reader. Due to the unique situation involving the remolding of our studio I haven't been able to find any information that pertains to all the factors in our planned renovation, I have so I have decided to write up this post. This is primarily a design/layout question here are as many details as I can provide: My Location: Brooklyn, NY we are in a modified warehouse type building with 10-11ft. concrete/brick cathedral ceilings the walls are sheetrock. We share a floor with quite a couple other recording studios. Our floor plan is 30ft x 13.7ft split into two rooms, one slightly smaller than the other with a double door separating the two Who we are: Abstract Rhythm. our main clientele is live music and overdubs, wherein we provide studio musicians and time in flat rate recording sessions. We work a lot with jazz and situations where we need isolation between multiple band members while having visual contact. We also do quite a bit of hourly vocal sessions R&B, Hip-Hop, Jazz. We record live drums on a regular basis, which gives you an idea of how loud we are. We are currently using our side like this: Goals: We have several goals: 1.) Due to complaints from other people on the floor we are trying to isolate our sound from their studios. This includes two points: A. The hallway entrance where we currently have 2 large 8ft. industrial doors that don't contain our sound at all. Allowing too much sound from the outside in. and everyone on the floor to hear us when we are working with live drums. B. The wall to the right of our space, which we share with another recording studio. 2.) We currently have 2 room setup. We rent one room out to another engineer with his own setup (the room with the windows). and although we'd like to plan for a future control room/live room setup. We are trying to keep costs low by sharing. We do have access to the room for isolation. In the short term we'd like to install a window between the two rooms, with the future option to take over the entire space, and turn one of the rooms into a control room. 3.)The construction of a vocal booth that isolates vocalists and permits visual contact with the engineer and the main room of the studio. **what this means: both rooms must be able to accommodate live musicians, and control room-type recording setups, as well as a vocal booth. 4.) Acoustics! Creating spaces that work equally well for mixing/tracking. Currently we have 14 ATS acoustic panels, and quite a bit of home-made mineral wool bass traps which are doing a pretty good job. We'd like in this remodeling to build the walls in a manor which cut down problems like reflections/flutter, rather then magnify them. (of course!) Problems: By adding additional walls, we cut into our space making our allready small rooms smaller. Although there may be better designs usigng the space diagonally, removing the existing center wall isn't really an option. keeping engineer setup's in each room. Accommodating for various furniture pieces and not blocking entrances/exits (we have studio desks, and two couches, including a very large leather couch) We absolutely need to make usage of the space as efficiently as possible. *ahh city living! Additionally I'd like to build as few walls as we can to keep the cost down. our budget is about $5000 max we have collected enough material to build a vocal booth and a 20x10ft wall, which cuts down on material costs. I have attached a sketchup file with my idea for the renovation, I am currently awaiting a quote from the contractor. so this is the time for any input! download it here: [url]http://www.djbakedpotato.com/sketch/abstractrhythmStudioMOD.skp [/url] Also here is the original space to scale if any of you want to try to modify it: :) [url]http://www.djbakedpotato.com/sketch/abstractrhythmStudioORIG.skp [/url] Our plan is to keep an air space between us and the rest of the floor by building two floor to ceiling walls and packing the backside with insulation. For the face of the wall we are thinking a layer of hushboard sound deadening panels, then 1/2" Sheetrock. As you see we're trying to sqeeze a lot into a small space! I'd like to incorporate shelving that reaches all the way to the ceiling to help deal with this --can we build the shelves into the new walls while still minimizing sound transfer to those around us? I basically cut a hole in center wall in order to accommodate a vocal booth that could be seen by both mix positions, with window between the two rooms. I framed in the original warehouse door and build a secondary wall, so there is now a two-door entrance to the studio maximizing isolation. I also designed a custom desk for the corner mix position. questions: what do you guys think about the corner mix position? I as the engineer am mainly focused on eye contact and saving floor space for musicians in the same room. I am a little worried about how the acoustics will work out, regarding the non-symmetrical design. What is your opinion of placing the mixing desk in the corner of the room at 45 degrees? Is this the best usage of space? any acoustic recommendations? thank you thank you and thank you for your help in advance. -DJ Baked Potato