First off, clearances are VERY IMPORTANT. They are your only way to stack the deck in your favor of your golden not having genetic disease. There are FOUR main clearances ALL GOLDENS must pass before being bred :
OFA Cardiac (heart) performed by a boarded cardiologist
CERF or OFA eye exam performed yearly by a boarded ophthalmologist
If you cannot verify current, final OFA clearances for all four on both parents of a litter you are looking at, walk away. You can verify clearances by typing in the registered name or AKC number on OFA's website : Orthopedic Foundation for Animals
Any breeder who does anything less or different or tells you they'll "show you the clearances when you buy the pup" -- walk away.
At any rate you don't want to spend the time, effort and money to raise and train a service dog and have it come down with bad hips or a heart condition, when that could have been avoided.
$2000 is on the high end for a well bred golden. Expect to pay closer to $1500.
Having said all that, have you trained dogs before and how do you expect to train a service dog? Have you investigated purchasing/being given an already trained service dog from an organization like PAWS, Canine Companions for Independence or New Horizons Service Dogs (they are local in central FL)?
Best of luck.