first off, welcome.
now, to answer your questions.
Most dealerships hit you for around $75-$100 an hour simply for labor, definitely check into some independent import mechanics in your area, chances are you will find a better rate.
If the chirping sound is only when you have the AC on, you can drive it anywhere you want with the AC off. It won't hurt the car at all, and you might even wind up getting better gas mileage.
You can disconnect the AC, but why? Just don't run the AC and roll a window down.
R.I.P fast 6
Two wheels or Four, I'm happy as long as the throttle is pinned.