basically you could spend half that on tools and parts and give up a weekend. Im guessing this guy thinks your mom is paying so hes willing to rebuild everything and make some money. More than likely the problem your looking to fix doesn't relate to everything listed. Theres even a chance that after all that he still wouldn't have fixed either problem.

If she is paying though, I personally would let it happen and thank my mommy dearly for future proofing my car.