The best way to create space in a blend is not to have too many ingredients but turn them up loud. In regards to physical space, it is staggering how different a guitar amp will sound from one room to another. I've had great results in smallish rooms with high ceilings. The room becomes an extension of the amplifier. The room becomes a speaker cabinet. The full bodied sound heard in that small room may be non-existent in a large warehouse room. The best rock and roll rooms in my experience have been rectangular rooms with tall ceilings.