Nathan, Why don't you have a go yourself? At the end you will have saved yourself heaps of money and you will also have the satisfaction of doing it all yourself. With others doing wiring and fiddly jobs like that, you just paying for labour costs.
I'd suggest concentrating on 1 thing at a time. Maybe just 1 wire to begin with, look at it, work out the best way you can hide it and achieve your goal. Then move onto the next item you want to hide. Eventually your engine bay will look neat as a pin. I would also suggest moving the battery to under the tray first. Doing that will clear up space around the motor so you can get in there and work with greater ease. Moving the battery will also eliminate 4 or so wires from the engine bay, so there you go, your already on your way. That's how I started with mine. I didn't even know what an earth wire was when I started. Now I've reduced the wires in my car to only 37 and you can only just see 4 in the engine bay. I'm working on hiding them soon too.
Just give it a go mate, I promise, it will be worth it.

Oh and if you know anyone in Sydney who you would recomend please let me know... Thanks



Nathan