New studio build, layout and ceiling advice please...

Hi, I've been running a small practice room and studio for few years now in the old offices above a warehouse and I've been pinching tips from here for a long time to improve my acoustics and room isolation to great effect. It's a superb resource. Project outline: I've recently been given the opportunity to take on the warehouse downstairs and am in the planning stages of laying out a larger studio with three separate practice rooms. I've got a lot of building experience but this is the largest project I've undertaken yet so here I am. The usable floor space I've got is 10.5m x 17m on a solid concrete slab. There is a basement under the front part of the building but the area I'm proposing to build on is on solid ground. There is a main road at the front of the building, a mechanics on one side and a dance school on the other. However, my building reaches way behind the neighbours. The back of the building faces a dead end street with no buildings on it, so the nearest neighbour that way is an abandoned warehouse over 10m away. The warehouse walls are over a foot thick, brick and concrete. At one end of the building are two stories of offices (where my studio is currently based) and a roller shutter door which I intend to keep for loading in and out. At the far end is a toilet and wash room. I am not so concerned by noise from outside the building as the walls are so thick (this place is bomb proof). I am working here at the moment and apart from some very quiet low end traffic noise the ambient noise inside is minimal. Studio Uses and Goals: In the practice room I get a mix of different genres from acoustic acts to full on metal bands so I'm looking at up to 110-130dB, I think (I've not had a chance to get my sound meter in a loud session yet), in each one. Between the practice rooms I'm not looking for total isolation, just enough that each band can play at their own volume without interfering with each other. The studio obviously needs to be as isolated as possible. The live room and control room need to be separate enough to allow a noisy rock drummer to play in the live room whilst being able to monitor accurately from the control room. I rarely, if ever, have the full band recording with the drums and amps in the same room. As you can see from my design, the studio and practice rooms are separated by a corridor (which links the existing offices to the toilet) and the practice rooms separated from the corridor by individual sound locks. My intention is to build the corridor, studio and practice room 1 in the first phase then add on practice rooms 2 and 3 at a later date. My budget for phase 1 is £5000. If this doesn't sound like enough then I can sacrifice practice room 1 until phase 2. I intend to make the rooms using wooden frame/plaster board double walls. Possibly layering fibre board between my plasterboard for extra separation. Question: The warehouse is approximately 10m high with a pitched roof about 12 at its peak. I don't want to build my rooms that high, so my main concern is how high to build each room and whether I need to put one large suspended ceiling over the whole layout or whether it it better to keep each room and corridor as separate individual pods? My understanding (for the live room at least) is that the higher the better, but 10m seems a bit excessive and my budget won't stretch to that. I'm thinking somewhere in the region of 3-4m for each room. I have tried to include all the relevant information required but if I'm missing anything please let me know. Any help/suggestions/feedback would be greatly appreciated. I am also still getting to grips with sketch up so I hope by plan is clear enough to follow. The brick and wood filled areas are the existing structures. The wooden extension of the brick building is the practice room extension I built a couple of years ago. The little wooden off-shot room on the pillar is my current studio toilet which I built when I moved in. There is also a trap door over the cellar steps that I've not included. I tried to upload the actual Sketch Up file but it was too large. Even after purging it was 1.5mb. Any suggestions? Many thanks in advance, Chris

Hi there I am no expert but am thinking this is a great space to work with, I'm sure one of the experts will be along to help at some point, My only thought is that the budget you mentioned might be tight for a 'commercial studio' depending on wether you can gain some materials cheaply. i will look forward to this build once you start as I like to read most builds for tips also.