Forgot something here...
Another thing you need to consider.
Balanced cabling has two different types of shielding available, foil and braided. Foil shielding is much better, and cheaper to buy, but the foil is easy to crack and break, thus, not suitable for microphone cable, or patch bay jumpers.
Braided shielding is much more expensive, and does not shield quite as well, so it is not really suitable for the miles of wire you will need to interconnect your studio.
Foil shielding for interconnects (like comprssors to the patchbay, etc....)
Braided shielding for mic cables and patchbay jumpers.
Also, you can usually get bulk wire with many induvidually shielded "pairs". This would be like audio snake wire, and is usually a better price then buy single line stuff (better price overall that is....but a 100' roll of Mogami 16 channel snake wire could set you back around $500 just for the wire....then there is the connector cost at around $4 per connector...YOU do the math here...
). So, you may want to buy like some 8 channel snake wire for your interconnects, foil shield of course, then some single line braided shield for your mic cables and patchbay jumpers.
Ed