My whole studio (my current one) runs on one 25 amp breaker. And its NEVER kicked. That's all the lights, and all the gear, PC included.
Being a gear slut (cough) I have to have two 20A breakers minimum for my home studio. No choice in the matter unless I have a super-sale on e-bay.
And I may do that, there are so many modules that I have that power up, blink their LED's, and receive so little midi data these days.
Use Ohm's Law to calculate the wattage, and you come up with 3000 watts! I wouldn't condition for anything less than that.
Can I ask why not? All you need is a compressor (fridge, freezer) or an electric drill being used and it might go right into your audio stream.
BTW, you only get drill noise when the take is absolutely perfect after 50 tries
Now, new construction is different story. I'll have a 200 amp service, and I think I'd like to condition the power at the terminal for the whole studio.
12,000W UPS can be provided in a 10U container, for a mere 1 buck per watt list price.
http://www.hp.com
UPS R12000 XR, N+x
Rated at 12000 VA / 12000 Watts, this 10U rack UPS has modular “N+x” parallel redundant design, hot-swappable modules, automatic bypass, superior batteries; and patented wireless paralleling technology providing high system availability
Compatible with All rackmount ProLiant BL, DL and ML lines
Part Number 207552-B22
APC I'm sure has a less costly model, but their website was down, so i went to HP just to give you a rude ballpark.
Now Michael, you calculated out that you need 24,000 watts, but I'd bet a good portion of that is not computer, audio, and midi gear, as you'll have lighting, doorbells, the need to plug in hand drills on occasion (to load and unload racks

), maybe a stove/fridge/dishwasher of you have a small snack area in your studio's lounge, and things of that nature that really don't need conditioned power. You'd also want to double the outlets, using colored duplexes (usually red) to indicate the outlet is on the UPS, and an ordinary black (or brown or white) outlet to indicate its on the mains, not UPS. the non-red outlets is what future construction crews should use, not the UPS ones.
Another option, if you have the rack space, is to purchased smaller rackmount units in the 2000-3000 watt range, and plug your critical gear into those, and feed the UPS 110V @ 30A getting 110V 20A out. A few of those might solve the problem too, and you don't have to deal with hardwiring a 12,000W unit, which will generate some serious heat, have many fans and such, and require a seperate room thats ventilated.
Once you're in the commercial power area you're talking serious hardware, with serious environment requirements, and don't expect to move them with four big guys
Hope I helped without scaring you!
The last data center I built, I had a 6000A UPS, which was about 2600 sq feet in itself, including row after row of batteries
