iirc, pad replacement goes for around $100, but that's not including rotor replacement and rotors cost more. But, it's an easy job to do yourself, and the total parts cost for all new pads & rotors will be considerably cheaper than paying someone to do it.

I rip my brakes apart all the time, it's very simple. The only tools you'll need are a 17mm socket + rachet, a C-clamp (you just need to squeeze the caliper piston so new pads will clear the rotor; very simple), and something to get the rotor screws out (an impact screw driver and/or a drill; feel free to destroy the screws, as you do not need to replace them). Just don't use the C-clamp on the rear caliper pistons, because you have to turn them to make them compress.