The vehicle may have been sitting long enough for the slides on the front rotors to become rusted to the point they would not slide.
I normally do the caliper and brake pad changes my self. The slides must be coated with good brake lube not just grease. The slide area would need to be cleaned, wire brushed heavily on first change. The factory does not lube very good.
CALIPERS DO NOT GET TURNED, the rotors get turned
Rotors can be turned if they have not been done before. Replacements can be cost effective. I can get rotors turned for about 1/2 the cost of replacements.
The system needs to be totaly flushed and new brake fluid installed. Make sure the fluid is high temperature not just regular brake fluid.
You may want to get a second estimate.