Question abt co-design of mixing and performance rooms

I'm getting near to redesigning a performance room I had designed in ard 1985. Then, I designed it as a place to play and record the instruments in. Now however, I kinda need to use it as both. IE., setting the MTR there for mixing AND micing the instruments and voices there. One man operation. My question: Can I analyze and construct it for that dual use role? Maybe, even some changeable type traps/freq-control devices? Thanks for any advice! :) Rick