DIY man.
There's not a lot to a brake caliper. Hardest part would be the rears because of the handbrake assembly. But it's pretty much a few bolts holding the caliper halves together, remove the seals, bit of compressed air into the brake fluid galleries to get the piston out, remove the o-ring, wet and dry sandpaper to clean up the bore, replace the o-ring, lube up the new piston with some grease or new brake fluid, push it back in, reapply the seals, and you're done. Rinse and repeat. Took me about an hour.